21192192000 has 1040 divisors, whose sum is σ = 91531083072. Its totient is φ = 4777574400.

The previous prime is 21192191903. The next prime is 21192192017. The reversal of 21192192000 is 29129112.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 290303964 + ... + 290304036.

Almost surely, 2^21192192000 is an apocalyptic number.

21192192000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21192192000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45765541536).

21192192000 is an abundant number, since it is smaller than the sum of its proper divisors (70338891072).

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

21192192000 is an frugal number, since it uses more digits than its factorization.

21192192000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 21192192000 in words is "twenty-one billion, one hundred ninety-two million, one hundred ninety-two thousand".