20456698531 has 8 divisors (see below), whose sum is σ = 21405862784. Its totient is φ = 19525613760.

The previous prime is 20456698511. The next prime is 20456698573. The reversal of 20456698531 is 13589665402.

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 20456698531 - 2¹⁷ = 20456567459 is a prime.

It is a super-2 number, since 2×20456698531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20456698511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4517556 + ... + 4522081.

It is an arithmetic number, because the mean of its divisors is an integer number (2675732848).

Almost surely, 2^20456698531 is an apocalyptic number.

20456698531 is a deficient number, since it is larger than the sum of its proper divisors (949164253).

20456698531 is an equidigital number, since it uses as much as digits as its factorization.

20456698531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9039741.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 20456698531 in words is "twenty billion, four hundred fifty-six million, six hundred ninety-eight thousand, five hundred thirty-one".