19810254204 has 36 divisors (see below), whose sum is σ = 53927915496. Its totient is φ = 6095462688.

The previous prime is 19810254161. The next prime is 19810254209. The reversal of 19810254204 is 40245201891.

19810254204 is a `hidden beast` number, since 1 + 9 + 8 + 102 + 542 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19810254209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21164334 + ... + 21165269.

Almost surely, 2^19810254204 is an apocalyptic number.

It is an amenable number.

19810254204 is an abundant number, since it is smaller than the sum of its proper divisors (34117661292).

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

19810254204 is a wasteful number, since it uses less digits than its factorization.

19810254204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42329626 (or 42329621 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 19810254204 in words is "nineteen billion, eight hundred ten million, two hundred fifty-four thousand, two hundred four".