21192966025 has 48 divisors (see below), whose sum is σ = 33525854208. Its totient is φ = 12903912000.

The previous prime is 21192966007. The next prime is 21192966049. The reversal of 21192966025 is 52066929112.

It is not a de Polignac number, because 21192966025 - 2⁵ = 21192965993 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45241 + ... + 210790.

It is an arithmetic number, because the mean of its divisors is an integer number (698455296).

Almost surely, 2^21192966025 is an apocalyptic number.

21192966025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21192966025 is a deficient number, since it is larger than the sum of its proper divisors (12332888183).

21192966025 is a wasteful number, since it uses less digits than its factorization.

21192966025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256102 (or 256097 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 21192966025 in words is "twenty-one billion, one hundred ninety-two million, nine hundred sixty-six thousand, twenty-five".