20557006706 has 8 divisors (see below), whose sum is σ = 31123692720. Its totient is φ = 10182442468.

The previous prime is 20557006643. The next prime is 20557006711. The reversal of 20557006706 is 60760075502.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20557006706.

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, 48030176 + ... + 48030603.

It is an arithmetic number, because the mean of its divisors is an integer number (3890461590).

Almost surely, 2^20557006706 is an apocalyptic number.

20557006706 is a deficient number, since it is larger than the sum of its proper divisors (10566686014).

20557006706 is a wasteful number, since it uses less digits than its factorization.

20557006706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96060888.

The product of its (nonzero) digits is 88200, while the sum is 38.

The spelling of 20557006706 in words is "twenty billion, five hundred fifty-seven million, six thousand, seven hundred six".