20758617090 has 32 divisors (see below), whose sum is σ = 55356312960. Its totient is φ = 5535631152.

The previous prime is 20758617071. The next prime is 20758617101. The reversal of 20758617090 is 9071685702.

20758617090 is a `hidden beast` number, since 20 + 7 + 5 + 8 + 617 + 0 + 9 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38441614 + ... + 38442153.

It is an arithmetic number, because the mean of its divisors is an integer number (1729884780).

Almost surely, 2^20758617090 is an apocalyptic number.

20758617090 is an abundant number, since it is smaller than the sum of its proper divisors (34597695870).

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

20758617090 is a wasteful number, since it uses less digits than its factorization.

20758617090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76883783 (or 76883777 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

It can be divided in two parts, 207586 and 17090, that added together give a square (224676 = 474²).

The spelling of 20758617090 in words is "twenty billion, seven hundred fifty-eight million, six hundred seventeen thousand, ninety".