20000021000023 has 8 divisors (see below), whose sum is σ = 20068168444208. Its totient is φ = 19931900624064.

The previous prime is 20000021000017. The next prime is 20000021000093. The reversal of 20000021000023 is 32000012000002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20000021000023 - 2²⁹ = 19999484129111 is a prime.

It is a super-2 number, since 2×20000021000023² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000020999973 and 20000021000009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000021000093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5286240 + ... + 8242837.

It is an arithmetic number, because the mean of its divisors is an integer number (2508521055526).

Almost surely, 2^{20000021000023} is an apocalyptic number.

20000021000023 is a deficient number, since it is larger than the sum of its proper divisors (68147444185).

20000021000023 is a wasteful number, since it uses less digits than its factorization.

20000021000023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13534113.

The product of its (nonzero) digits is 24, while the sum is 10.

Adding to 20000021000023 its reverse (32000012000002), we get a palindrome (52000033000025).

It can be divided in two parts, 2000002 and 1000023, that added together give a triangular number (3000025 = T₂₄₄₉).

The spelling of 20000021000023 in words is "twenty trillion, twenty-one million, twenty-three", and thus it is an aban number and an uban number.