21162025046 has 4 divisors (see below), whose sum is σ = 31743037572. Its totient is φ = 10581012522.

The previous prime is 21162025043. The next prime is 21162025097. The reversal of 21162025046 is 64052026112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21162025043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5290506260 + ... + 5290506263.

It is an arithmetic number, because the mean of its divisors is an integer number (7935759393).

Almost surely, 2^21162025046 is an apocalyptic number.

21162025046 is a deficient number, since it is larger than the sum of its proper divisors (10581012526).

21162025046 is a wasteful number, since it uses less digits than its factorization.

21162025046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10581012525.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 21162025046 in words is "twenty-one billion, one hundred sixty-two million, twenty-five thousand, forty-six".