20021021202005 has 8 divisors (see below), whose sum is σ = 24025253176224. Its totient is φ = 16016798472400.

The previous prime is 20021021201977. The next prime is 20021021202043. The reversal of 20021021202005 is 50020212012002.

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

It is not a de Polignac number, because 20021021202005 - 2⁸ = 20021021201749 is a prime.

It is a super-2 number, since 2×20021021202005² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4040090 + ... + 7507620.

It is an arithmetic number, because the mean of its divisors is an integer number (3003156647028).

Almost surely, 2^{20021021202005} is an apocalyptic number.

It is an amenable number.

20021021202005 is a deficient number, since it is larger than the sum of its proper divisors (4004231974219).

20021021202005 is a wasteful number, since it uses less digits than its factorization.

20021021202005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4622307.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 20021021202005 its reverse (50020212012002), we get a palindrome (70041233214007).

The spelling of 20021021202005 in words is "twenty trillion, twenty-one billion, twenty-one million, two hundred two thousand, five".