20507201670 has 32 divisors (see below), whose sum is σ = 49222222560. Its totient is φ = 5468038400.

The previous prime is 20507201629. The next prime is 20507201699. The reversal of 20507201670 is 7610270502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334786 + ... + 391274.

It is an arithmetic number, because the mean of its divisors is an integer number (1538194455).

Almost surely, 2^20507201670 is an apocalyptic number.

20507201670 is an abundant number, since it is smaller than the sum of its proper divisors (28715020890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20507201670 is a wasteful number, since it uses less digits than its factorization.

20507201670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68600.

The product of its (nonzero) digits is 5880, while the sum is 30.

The spelling of 20507201670 in words is "twenty billion, five hundred seven million, two hundred one thousand, six hundred seventy".