20637700147 has 4 divisors (see below), whose sum is σ = 20639879536. Its totient is φ = 20635520760.

The previous prime is 20637700129. The next prime is 20637700159. The reversal of 20637700147 is 74100773602.

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

It is a cyclic number.

It is not a de Polignac number, because 20637700147 - 2⁷ = 20637700019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20637700547) 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, 1075428 + ... + 1094449.

It is an arithmetic number, because the mean of its divisors is an integer number (5159969884).

Almost surely, 2^20637700147 is an apocalyptic number.

20637700147 is a deficient number, since it is larger than the sum of its proper divisors (2179389).

20637700147 is an equidigital number, since it uses as much as digits as its factorization.

20637700147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179388.

The product of its (nonzero) digits is 49392, while the sum is 37.

The spelling of 20637700147 in words is "twenty billion, six hundred thirty-seven million, seven hundred thousand, one hundred forty-seven".