20627744431 has 16 divisors (see below), whose sum is σ = 23913216000. Its totient is φ = 17427691008.

The previous prime is 20627744369. The next prime is 20627744471. The reversal of 20627744431 is 13444772602.

It is not a de Polignac number, because 20627744431 - 2¹¹ = 20627742383 is a prime.

It is a super-2 number, since 2×20627744431² (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 (20627744471) 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, 300111 + ... + 362383.

It is an arithmetic number, because the mean of its divisors is an integer number (1494576000).

Almost surely, 2^20627744431 is an apocalyptic number.

20627744431 is a deficient number, since it is larger than the sum of its proper divisors (3285471569).

20627744431 is an equidigital number, since it uses as much as digits as its factorization.

20627744431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62958.

The product of its (nonzero) digits is 225792, while the sum is 40.

The spelling of 20627744431 in words is "twenty billion, six hundred twenty-seven million, seven hundred forty-four thousand, four hundred thirty-one".