20207512646 has 8 divisors (see below), whose sum is σ = 30374550720. Its totient is φ = 10082662408.

The previous prime is 20207512607. The next prime is 20207512651. The reversal of 20207512646 is 64621570202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10545761 + ... + 10547676.

It is an arithmetic number, because the mean of its divisors is an integer number (3796818840).

Almost surely, 2^20207512646 is an apocalyptic number.

20207512646 is a deficient number, since it is larger than the sum of its proper divisors (10167038074).

20207512646 is a wasteful number, since it uses less digits than its factorization.

20207512646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21093918.

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 20207512646 in words is "twenty billion, two hundred seven million, five hundred twelve thousand, six hundred forty-six".