21476637232746 has 16 divisors (see below), whose sum is σ = 43007168169504. Its totient is φ = 7149896793584.

The previous prime is 21476637232727. The next prime is 21476637232747. The reversal of 21476637232746 is 64723273667412.

It is a super-2 number, since 2×21476637232746² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21476637232746.

It is not an unprimeable number, because it can be changed into a prime (21476637232747) 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, 2245565820 + ... + 2245575383.

It is an arithmetic number, because the mean of its divisors is an integer number (2687948010594).

Almost surely, 2^{21476637232746} is an apocalyptic number.

21476637232746 is an abundant number, since it is smaller than the sum of its proper divisors (21530530936758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21476637232746 is a wasteful number, since it uses less digits than its factorization.

21476637232746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491142005.

The product of its digits is 85349376, while the sum is 60.

The spelling of 21476637232746 in words is "twenty-one trillion, four hundred seventy-six billion, six hundred thirty-seven million, two hundred thirty-two thousand, seven hundred forty-six".