20031998179284 has 384 divisors, whose sum is σ = 64920538726400. Its totient is φ = 5200561428480.

The previous prime is 20031998179261. The next prime is 20031998179307. The reversal of 20031998179284 is 48297189913002.

20031998179284 is a `hidden beast` number, since 20 + 0 + 3 + 199 + 81 + 79 + 284 = 666.

It is an interprime number because it is at equal distance from previous prime (20031998179261) and next prime (20031998179307).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 980460549 + ... + 980480979.

Almost surely, 2^{20031998179284} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20031998179284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32460269363200).

20031998179284 is an abundant number, since it is smaller than the sum of its proper divisors (44888540547116).

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

20031998179284 is a wasteful number, since it uses less digits than its factorization.

20031998179284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22020 (or 22012 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 63.

The spelling of 20031998179284 in words is "twenty trillion, thirty-one billion, nine hundred ninety-eight million, one hundred seventy-nine thousand, two hundred eighty-four".