19950156504 has 96 divisors (see below), whose sum is σ = 55533741120. Its totient is φ = 6466557888.

The previous prime is 19950156451. The next prime is 19950156509. The reversal of 19950156504 is 40565105991.

It is a happy number.

19950156504 is a `hidden beast` number, since 1 + 9 + 95 + 0 + 1 + 56 + 504 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 19950156504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19950156509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 688599 + ... + 716985.

It is an arithmetic number, because the mean of its divisors is an integer number (578476470).

Almost surely, 2^19950156504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19950156504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27766870560).

19950156504 is an abundant number, since it is smaller than the sum of its proper divisors (35583584616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19950156504 is a wasteful number, since it uses less digits than its factorization.

19950156504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28669 (or 28662 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 45.

The spelling of 19950156504 in words is "nineteen billion, nine hundred fifty million, one hundred fifty-six thousand, five hundred four".