20515385088 has 432 divisors, whose sum is σ = 67650186240. Its totient is φ = 5922201600.

The previous prime is 20515385087. The next prime is 20515385113. The reversal of 20515385088 is 88058351502.

20515385088 is a `hidden beast` number, since 2 + 0 + 515 + 3 + 8 + 50 + 88 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20515385087) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75702393 + ... + 75702663.

Almost surely, 2^20515385088 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 20515385088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33825093120).

20515385088 is an abundant number, since it is smaller than the sum of its proper divisors (47134801152).

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

20515385088 is a wasteful number, since it uses less digits than its factorization.

20515385088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 45.

The spelling of 20515385088 in words is "twenty billion, five hundred fifteen million, three hundred eighty-five thousand, eighty-eight".