20177985030 has 64 divisors (see below), whose sum is σ = 55893362688. Its totient is φ = 4566441600.

The previous prime is 20177985013. The next prime is 20177985041. The reversal of 20177985030 is 3058977102.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 454462 + ... + 496881.

It is an arithmetic number, because the mean of its divisors is an integer number (873333792).

Almost surely, 2^20177985030 is an apocalyptic number.

20177985030 is an abundant number, since it is smaller than the sum of its proper divisors (35715377658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20177985030 is a wasteful number, since it uses less digits than its factorization.

20177985030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951461.

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 20177985030 in words is "twenty billion, one hundred seventy-seven million, nine hundred eighty-five thousand, thirty".