20387585070 has 96 divisors (see below), whose sum is σ = 56503137600. Its totient is φ = 5082485760.

The previous prime is 20387585047. The next prime is 20387585083. The reversal of 20387585070 is 7058578302.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 183255 + ... + 272685.

It is an arithmetic number, because the mean of its divisors is an integer number (588574350).

Almost surely, 2^20387585070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20387585070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28251568800).

20387585070 is an abundant number, since it is smaller than the sum of its proper divisors (36115552530).

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

20387585070 is a wasteful number, since it uses less digits than its factorization.

20387585070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89610 (or 89607 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 20387585070 in words is "twenty billion, three hundred eighty-seven million, five hundred eighty-five thousand, seventy".