21925192 has 8 divisors (see below), whose sum is σ = 41109750. Its totient is φ = 10962592.

The previous prime is 21925159. The next prime is 21925219. The reversal of 21925192 is 29152912.

It can be written as a sum of positive squares in only one way, i.e., 18028516 + 3896676 = 4246^2 + 1974^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1370317 + ... + 1370332.

Almost surely, 2^21925192 is an apocalyptic number.

It is an amenable number.

21925192 is a deficient number, since it is larger than the sum of its proper divisors (19184558).

21925192 is a wasteful number, since it uses less digits than its factorization.

21925192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740655 (or 2740651 counting only the distinct ones).

The product of its digits is 3240, while the sum is 31.

The square root of 21925192 is about 4682.4344095780. The cubic root of 21925192 is about 279.8859739790.

The spelling of 21925192 in words is "twenty-one million, nine hundred twenty-five thousand, one hundred ninety-two".