21364098723 has 24 divisors (see below), whose sum is σ = 33672587520. Its totient is φ = 12944882160.

The previous prime is 21364098709. The next prime is 21364098727. The reversal of 21364098723 is 32789046312.

21364098723 is a `hidden beast` number, since 213 + 6 + 409 + 8 + 7 + 23 = 666.

It is not a de Polignac number, because 21364098723 - 2¹⁸ = 21363836579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21364098727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 438498 + ... + 484776.

It is an arithmetic number, because the mean of its divisors is an integer number (1403024480).

Almost surely, 2^21364098723 is an apocalyptic number.

21364098723 is a deficient number, since it is larger than the sum of its proper divisors (12308488797).

21364098723 is a wasteful number, since it uses less digits than its factorization.

21364098723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50959 (or 50956 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 21364098723 in words is "twenty-one billion, three hundred sixty-four million, ninety-eight thousand, seven hundred twenty-three".