189143427420 has 36 divisors (see below), whose sum is σ = 573735063720. Its totient is φ = 50438247264.

The previous prime is 189143427413. The next prime is 189143427449. The reversal of 189143427420 is 24724341981.

189143427420 is a `hidden beast` number, since 1 + 89 + 143 + 4 + 2 + 7 + 420 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×189143427420² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 525398230 + ... + 525398589.

Almost surely, 2^189143427420 is an apocalyptic number.

189143427420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189143427420 is an abundant number, since it is smaller than the sum of its proper divisors (384591636300).

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

189143427420 is a wasteful number, since it uses less digits than its factorization.

189143427420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050796834 (or 1050796829 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 189143427420 in words is "one hundred eighty-nine billion, one hundred forty-three million, four hundred twenty-seven thousand, four hundred twenty".