21292083754 has 4 divisors (see below), whose sum is σ = 31938125634. Its totient is φ = 10646041876.

The previous prime is 21292083731. The next prime is 21292083767. The reversal of 21292083754 is 45738029212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21206058129 + 86025625 = 145623^2 + 9275^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21292083754.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5323020937 + ... + 5323020940.

Almost surely, 2^21292083754 is an apocalyptic number.

21292083754 is a deficient number, since it is larger than the sum of its proper divisors (10646041880).

21292083754 is a wasteful number, since it uses less digits than its factorization.

21292083754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10646041879.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 21292083754 in words is "twenty-one billion, two hundred ninety-two million, eighty-three thousand, seven hundred fifty-four".