189929801982 has 16 divisors (see below), whose sum is σ = 379891934352. Its totient is φ = 63304545600.

The previous prime is 189929801959. The next prime is 189929802043. The reversal of 189929801982 is 289108929981.

It is a super-2 number, since 2×189929801982² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 1270393 + ... + 1412004.

It is an arithmetic number, because the mean of its divisors is an integer number (23743245897).

Almost surely, 2^189929801982 is an apocalyptic number.

189929801982 is an abundant number, since it is smaller than the sum of its proper divisors (189962132370).

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

189929801982 is a wasteful number, since it uses less digits than its factorization.

189929801982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694203.

The product of its (nonzero) digits is 13436928, while the sum is 66.

The spelling of 189929801982 in words is "one hundred eighty-nine billion, nine hundred twenty-nine million, eight hundred one thousand, nine hundred eighty-two".