21301000023 has 16 divisors (see below), whose sum is σ = 29479503872. Its totient is φ = 13666644000.

The previous prime is 21301000001. The next prime is 21301000027. The reversal of 21301000023 is 32000010312.

It is a happy number.

It is not a de Polignac number, because 21301000023 - 2¹² = 21300995927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21300999972 and 21301000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301000027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615883 + ... + 649548.

It is an arithmetic number, because the mean of its divisors is an integer number (1842468992).

Almost surely, 2^21301000023 is an apocalyptic number.

21301000023 is a deficient number, since it is larger than the sum of its proper divisors (8178503849).

21301000023 is a wasteful number, since it uses less digits than its factorization.

21301000023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265646.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21301000023 its reverse (32000010312), we get a palindrome (53301010335).

The spelling of 21301000023 in words is "twenty-one billion, three hundred one million, twenty-three", and thus it is an aban number.