21462644036 has 24 divisors (see below), whose sum is σ = 40811823360. Its totient is φ = 9838562400.

The previous prime is 21462644033. The next prime is 21462644101. The reversal of 21462644036 is 63044626412.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (21462644033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4552535 + ... + 4557246.

It is an arithmetic number, because the mean of its divisors is an integer number (1700492640).

Almost surely, 2^21462644036 is an apocalyptic number.

It is an amenable number.

21462644036 is a deficient number, since it is larger than the sum of its proper divisors (19349179324).

21462644036 is a wasteful number, since it uses less digits than its factorization.

21462644036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9109835 (or 9109833 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 21462644036 in words is "twenty-one billion, four hundred sixty-two million, six hundred forty-four thousand, thirty-six".