21695200249712 has 20 divisors (see below), whose sum is σ = 45855764164536. Its totient is φ = 9861454658880.

The previous prime is 21695200249691. The next prime is 21695200249727. The reversal of 21695200249712 is 21794200259612.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61634091443 + ... + 61634091794.

Almost surely, 2^{21695200249712} is an apocalyptic number.

21695200249712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21695200249712 is an abundant number, since it is smaller than the sum of its proper divisors (24160563914824).

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

21695200249712 is a wasteful number, since it uses less digits than its factorization.

21695200249712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123268183256 (or 123268183250 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

It can be divided in two parts, 21695200 and 249712, that added together give a palindrome (21944912).

The spelling of 21695200249712 in words is "twenty-one trillion, six hundred ninety-five billion, two hundred million, two hundred forty-nine thousand, seven hundred twelve".