20315257207 has 4 divisors (see below), whose sum is σ = 23217436816. Its totient is φ = 17413077600.

The previous prime is 20315257153. The next prime is 20315257211. The reversal of 20315257207 is 70275251302.

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 20315257207 - 2¹¹ = 20315255159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315257217) 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, 1451089794 + ... + 1451089807.

It is an arithmetic number, because the mean of its divisors is an integer number (5804359204).

Almost surely, 2^20315257207 is an apocalyptic number.

20315257207 is a deficient number, since it is larger than the sum of its proper divisors (2902179609).

20315257207 is an equidigital number, since it uses as much as digits as its factorization.

20315257207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902179608.

The product of its (nonzero) digits is 29400, while the sum is 34.

The spelling of 20315257207 in words is "twenty billion, three hundred fifteen million, two hundred fifty-seven thousand, two hundred seven".