20189047970 has 128 divisors (see below), whose sum is σ = 45388062720. Its totient is φ = 6295760640.

The previous prime is 20189047919. The next prime is 20189047981. The reversal of 20189047970 is 7974098102.

It is a super-2 number, since 2×20189047970² (a number of 21 digits) contains 22 as substring.

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 63 ways as a sum of consecutive naturals, for example, 19430711 + ... + 19431749.

It is an arithmetic number, because the mean of its divisors is an integer number (354594240).

Almost surely, 2^20189047970 is an apocalyptic number.

20189047970 is an abundant number, since it is smaller than the sum of its proper divisors (25199014750).

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

20189047970 is a wasteful number, since it uses less digits than its factorization.

20189047970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360.

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 20189047970 in words is "twenty billion, one hundred eighty-nine million, forty-seven thousand, nine hundred seventy".