90020052790 has 32 divisors (see below), whose sum is σ = 163786645440. Its totient is φ = 35620992000.

The previous prime is 90020052713. The next prime is 90020052799. The reversal of 90020052790 is 9725002009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90020052799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240226 + ... + 487594.

It is an arithmetic number, because the mean of its divisors is an integer number (5118332670).

Almost surely, 2^90020052790 is an apocalyptic number.

90020052790 is a deficient number, since it is larger than the sum of its proper divisors (73766592650).

90020052790 is a wasteful number, since it uses less digits than its factorization.

90020052790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247768.

The product of its (nonzero) digits is 11340, while the sum is 34.

Adding to 90020052790 its reverse (9725002009), we get a palindrome (99745054799).

The spelling of 90020052790 in words is "ninety billion, twenty million, fifty-two thousand, seven hundred ninety".