19523977965994 has 32 divisors (see below), whose sum is σ = 30162467234880. Its totient is φ = 9471339704448.

The previous prime is 19523977965983. The next prime is 19523977966093. The reversal of 19523977965994 is 49956977932591.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53215809 + ... + 53581435.

It is an arithmetic number, because the mean of its divisors is an integer number (942577101090).

Almost surely, 2^{19523977965994} is an apocalyptic number.

19523977965994 is a deficient number, since it is larger than the sum of its proper divisors (10638489268886).

19523977965994 is a wasteful number, since it uses less digits than its factorization.

19523977965994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367702.

The product of its digits is 10416243600, while the sum is 85.

The spelling of 19523977965994 in words is "nineteen trillion, five hundred twenty-three billion, nine hundred seventy-seven million, nine hundred sixty-five thousand, nine hundred ninety-four".