20165633224631 has 4 divisors (see below), whose sum is σ = 20170048738992. Its totient is φ = 20161217710272.

The previous prime is 20165633224621. The next prime is 20165633224637. The reversal of 20165633224631 is 13642233656102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20165633224631 is a prime.

It is a super-2 number, since 2×20165633224631² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165633224637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207750330 + ... + 2207759463.

It is an arithmetic number, because the mean of its divisors is an integer number (5042512184748).

Almost surely, 2^{20165633224631} is an apocalyptic number.

20165633224631 is a deficient number, since it is larger than the sum of its proper divisors (4415514361).

20165633224631 is an equidigital number, since it uses as much as digits as its factorization.

20165633224631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4415514360.

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 20165633224631 in words is "twenty trillion, one hundred sixty-five billion, six hundred thirty-three million, two hundred twenty-four thousand, six hundred thirty-one".