20538278298720 has 576 divisors, whose sum is σ = 88266857462784. Its totient is φ = 4232574259200.

The previous prime is 20538278298701. The next prime is 20538278298757. The reversal of 20538278298720 is 2789287283502.

20538278298720 is a `hidden beast` number, since 2 + 0 + 5 + 3 + 8 + 278 + 298 + 72 + 0 = 666.

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 95 ways as a sum of consecutive naturals, for example, 3812245 + ... + 7457195.

It is an arithmetic number, because the mean of its divisors is an integer number (153241071984).

Almost surely, 2^{20538278298720} is an apocalyptic number.

20538278298720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20538278298720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44133428731392).

20538278298720 is an abundant number, since it is smaller than the sum of its proper divisors (67728579164064).

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

20538278298720 is a wasteful number, since it uses less digits than its factorization.

20538278298720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3645035 (or 3645024 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 63.

The spelling of 20538278298720 in words is "twenty trillion, five hundred thirty-eight billion, two hundred seventy-eight million, two hundred ninety-eight thousand, seven hundred twenty".