20016152640 has 336 divisors, whose sum is σ = 77699494080. Its totient is φ = 4684861440.

The previous prime is 20016152609. The next prime is 20016152731. The reversal of 20016152640 is 4625161002.

20016152640 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 6 + 15 + 2 + 640 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 907827 + ... + 929613.

Almost surely, 2^20016152640 is an apocalyptic number.

20016152640 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 20016152640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38849747040).

20016152640 is an abundant number, since it is smaller than the sum of its proper divisors (57683341440).

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

20016152640 is a wasteful number, since it uses less digits than its factorization.

20016152640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21850 (or 21837 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The spelling of 20016152640 in words is "twenty billion, sixteen million, one hundred fifty-two thousand, six hundred forty".