21030504192 has 216 divisors, whose sum is σ = 62371073856. Its totient is φ = 6811803648.

The previous prime is 21030504163. The next prime is 21030504233. The reversal of 21030504192 is 29140503012.

21030504192 is a `hidden beast` number, since 210 + 30 + 5 + 0 + 419 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17000598 + ... + 17001834.

Almost surely, 2^21030504192 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 21030504192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31185536928).

21030504192 is an abundant number, since it is smaller than the sum of its proper divisors (41340569664).

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

21030504192 is a wasteful number, since it uses less digits than its factorization.

21030504192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463 (or 1446 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The spelling of 21030504192 in words is "twenty-one billion, thirty million, five hundred four thousand, one hundred ninety-two".