20245537872 has 200 divisors, whose sum is σ = 67077242496. Its totient is φ = 5774955264.

The previous prime is 20245537861. The next prime is 20245537889. The reversal of 20245537872 is 27873554202.

20245537872 is a `hidden beast` number, since 2 + 0 + 2 + 45 + 537 + 8 + 72 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7011213 + ... + 7014099.

Almost surely, 2^20245537872 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 20245537872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33538621248).

20245537872 is an abundant number, since it is smaller than the sum of its proper divisors (46831704624).

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

20245537872 is a wasteful number, since it uses less digits than its factorization.

20245537872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687 (or 3672 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 45.

The spelling of 20245537872 in words is "twenty billion, two hundred forty-five million, five hundred thirty-seven thousand, eight hundred seventy-two".