20657051206 has 8 divisors (see below), whose sum is σ = 33802447464. Its totient is φ = 9389568720.

The previous prime is 20657051201. The next prime is 20657051213. The reversal of 20657051206 is 60215075602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20657051201) 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, 469478415 + ... + 469478458.

It is an arithmetic number, because the mean of its divisors is an integer number (4225305933).

Almost surely, 2^20657051206 is an apocalyptic number.

20657051206 is a deficient number, since it is larger than the sum of its proper divisors (13145396258).

20657051206 is a wasteful number, since it uses less digits than its factorization.

20657051206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938956886.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 20657051206 in words is "twenty billion, six hundred fifty-seven million, fifty-one thousand, two hundred six".