19631897152923 has 16 divisors (see below), whose sum is σ = 29476631503872. Its totient is φ = 11514309180000.

The previous prime is 19631897152909. The next prime is 19631897152951. The reversal of 19631897152923 is 32925179813691.

It is a happy number.

It is not a de Polignac number, because 19631897152923 - 2⁶ = 19631897152859 is a prime.

It is a super-2 number, since 2×19631897152923² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19631897152723) 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, 9595256628 + ... + 9595258673.

It is an arithmetic number, because the mean of its divisors is an integer number (1842289468992).

Almost surely, 2^{19631897152923} is an apocalyptic number.

19631897152923 is a deficient number, since it is larger than the sum of its proper divisors (9844734350949).

19631897152923 is a wasteful number, since it uses less digits than its factorization.

19631897152923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19190515346.

The product of its digits is 44089920, while the sum is 66.

The spelling of 19631897152923 in words is "nineteen trillion, six hundred thirty-one billion, eight hundred ninety-seven million, one hundred fifty-two thousand, nine hundred twenty-three".