36700020021 has 16 divisors (see below), whose sum is σ = 57435296384. Its totient is φ = 20404643904.

The previous prime is 36700019977. The next prime is 36700020029. The reversal of 36700020021 is 12002000763.

It is a happy number.

It is not a de Polignac number, because 36700020021 - 2⁶ = 36700019957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 36700020021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36700020029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23615710 + ... + 23617263.

It is an arithmetic number, because the mean of its divisors is an integer number (3589706024).

Almost surely, 2^36700020021 is an apocalyptic number.

It is an amenable number.

36700020021 is a deficient number, since it is larger than the sum of its proper divisors (20735276363).

36700020021 is a wasteful number, since it uses less digits than its factorization.

36700020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47233020.

The product of its (nonzero) digits is 504, while the sum is 21.

Adding to 36700020021 its reverse (12002000763), we get a palindrome (48702020784).

The spelling of 36700020021 in words is "thirty-six billion, seven hundred million, twenty thousand, twenty-one".