20249628431 has 8 divisors (see below), whose sum is σ = 20283788544. Its totient is φ = 20215499040.

The previous prime is 20249628409. The next prime is 20249628449. The reversal of 20249628431 is 13482694202.

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 20249628431 - 2⁶ = 20249628367 is a prime.

It is a super-2 number, since 2×20249628431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20249628491) 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, 1573001 + ... + 1585821.

It is an arithmetic number, because the mean of its divisors is an integer number (2535473568).

Almost surely, 2^20249628431 is an apocalyptic number.

20249628431 is a deficient number, since it is larger than the sum of its proper divisors (34160113).

20249628431 is a wasteful number, since it uses less digits than its factorization.

20249628431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15361.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 20249628431 in words is "twenty billion, two hundred forty-nine million, six hundred twenty-eight thousand, four hundred thirty-one".