19957088623 has 4 divisors (see below), whose sum is σ = 20009196288. Its totient is φ = 19904980960.

The previous prime is 19957088621. The next prime is 19957088677. The reversal of 19957088623 is 32688075991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19957088623 - 2¹ = 19957088621 is a prime.

It is a super-2 number, since 2×19957088623² (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 (19957088621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26053258 + ... + 26054023.

It is an arithmetic number, because the mean of its divisors is an integer number (5002299072).

Almost surely, 2^19957088623 is an apocalyptic number.

19957088623 is a deficient number, since it is larger than the sum of its proper divisors (52107665).

19957088623 is an equidigital number, since it uses as much as digits as its factorization.

19957088623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52107664.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 19957088623 in words is "nineteen billion, nine hundred fifty-seven million, eighty-eight thousand, six hundred twenty-three".