189898243054 has 16 divisors (see below), whose sum is σ = 312546602592. Its totient is φ = 85991656608.

The previous prime is 189898243043. The next prime is 189898243057. The reversal of 189898243054 is 450342898981.

It is a super-2 number, since 2×189898243054² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 189898242983 and 189898243001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189898243057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68902194 + ... + 68904949.

It is an arithmetic number, because the mean of its divisors is an integer number (19534162662).

Almost surely, 2^189898243054 is an apocalyptic number.

189898243054 is a deficient number, since it is larger than the sum of its proper divisors (122648359538).

189898243054 is a wasteful number, since it uses less digits than its factorization.

189898243054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137807211.

The product of its (nonzero) digits is 19906560, while the sum is 61.

The spelling of 189898243054 in words is "one hundred eighty-nine billion, eight hundred ninety-eight million, two hundred forty-three thousand, fifty-four".