20620173785 has 8 divisors (see below), whose sum is σ = 25820043840. Its totient is φ = 15778915504.

The previous prime is 20620173773. The next prime is 20620173797. The reversal of 20620173785 is 58737102602.

It is an interprime number because it is at equal distance from previous prime (20620173773) and next prime (20620173797).

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

It is a cyclic number.

It is not a de Polignac number, because 20620173785 - 2³⁴ = 3440304601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89652815 + ... + 89653044.

It is an arithmetic number, because the mean of its divisors is an integer number (3227505480).

Almost surely, 2^20620173785 is an apocalyptic number.

It is an amenable number.

20620173785 is a deficient number, since it is larger than the sum of its proper divisors (5199870055).

20620173785 is a wasteful number, since it uses less digits than its factorization.

20620173785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179305887.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 20620173785 in words is "twenty billion, six hundred twenty million, one hundred seventy-three thousand, seven hundred eighty-five".