20670172893 has 32 divisors (see below), whose sum is σ = 30734640000. Its totient is φ = 13729752576.

The previous prime is 20670172843. The next prime is 20670172921. The reversal of 20670172893 is 39827107602.

It is not a de Polignac number, because 20670172893 - 2¹³ = 20670164701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670172843) by changing a digit.

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, 12766438 + ... + 12768056.

It is an arithmetic number, because the mean of its divisors is an integer number (960457500).

Almost surely, 2^20670172893 is an apocalyptic number.

It is an amenable number.

20670172893 is a deficient number, since it is larger than the sum of its proper divisors (10064467107).

20670172893 is a wasteful number, since it uses less digits than its factorization.

20670172893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066 (or 3060 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 20670172893 in words is "twenty billion, six hundred seventy million, one hundred seventy-two thousand, eight hundred ninety-three".