20706033658 has 16 divisors (see below), whose sum is σ = 31301557056. Its totient is φ = 10272496000.

The previous prime is 20706033653. The next prime is 20706033679. The reversal of 20706033658 is 85633060702.

It is a self number, because there is not a number n which added to its sum of digits gives 20706033658.

It is not an unprimeable number, because it can be changed into a prime (20706033653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53610 + ... + 210442.

It is an arithmetic number, because the mean of its divisors is an integer number (1956347316).

Almost surely, 2^20706033658 is an apocalyptic number.

20706033658 is a deficient number, since it is larger than the sum of its proper divisors (10595523398).

20706033658 is a wasteful number, since it uses less digits than its factorization.

20706033658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157349.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 20706033658 in words is "twenty billion, seven hundred six million, thirty-three thousand, six hundred fifty-eight".