20867904507 has 4 divisors (see below), whose sum is σ = 27823872680. Its totient is φ = 13911936336.

The previous prime is 20867904469. The next prime is 20867904619. The reversal of 20867904507 is 70540976802.

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

It is not a de Polignac number, because 20867904507 - 2¹¹ = 20867902459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20867404507) 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, 3477984082 + ... + 3477984087.

It is an arithmetic number, because the mean of its divisors is an integer number (6955968170).

Almost surely, 2^20867904507 is an apocalyptic number.

20867904507 is a deficient number, since it is larger than the sum of its proper divisors (6955968173).

20867904507 is an equidigital number, since it uses as much as digits as its factorization.

20867904507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6955968172.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 20867904507 in words is "twenty billion, eight hundred sixty-seven million, nine hundred four thousand, five hundred seven".