21455427076 has 36 divisors (see below), whose sum is σ = 39666397680. Its totient is φ = 10153036080.

The previous prime is 21455427061. The next prime is 21455427079. The reversal of 21455427076 is 67072455412.

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

It is not an unprimeable number, because it can be changed into a prime (21455427079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1568595 + ... + 1582213.

It is an arithmetic number, because the mean of its divisors is an integer number (1101844380).

Almost surely, 2^21455427076 is an apocalyptic number.

It is an amenable number.

21455427076 is a deficient number, since it is larger than the sum of its proper divisors (18210970604).

21455427076 is a wasteful number, since it uses less digits than its factorization.

21455427076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14752 (or 14731 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 43.

The spelling of 21455427076 in words is "twenty-one billion, four hundred fifty-five million, four hundred twenty-seven thousand, seventy-six".