21627587146 has 16 divisors (see below), whose sum is σ = 36058346208. Its totient is φ = 9645235600.

The previous prime is 21627587129. The next prime is 21627587147. The reversal of 21627587146 is 64178572612.

It is a self number, because there is not a number n which added to its sum of digits gives 21627587146.

It is not an unprimeable number, because it can be changed into a prime (21627587147) 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, 9273100 + ... + 9275431.

It is an arithmetic number, because the mean of its divisors is an integer number (2253646638).

Almost surely, 2^21627587146 is an apocalyptic number.

21627587146 is a deficient number, since it is larger than the sum of its proper divisors (14430759062).

21627587146 is a wasteful number, since it uses less digits than its factorization.

21627587146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18548597.

The product of its digits is 1128960, while the sum is 49.

The spelling of 21627587146 in words is "twenty-one billion, six hundred twenty-seven million, five hundred eighty-seven thousand, one hundred forty-six".