90699026780020 has 24 divisors (see below), whose sum is σ = 196612083859968. Its totient is φ = 35109300688800.

The previous prime is 90699026780017. The next prime is 90699026780027. The reversal of 90699026780020 is 2008762099609.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90699026780027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73144375816 + ... + 73144377055.

It is an arithmetic number, because the mean of its divisors is an integer number (8192170160832).

Almost surely, 2^{90699026780020} is an apocalyptic number.

It is an amenable number.

90699026780020 is an abundant number, since it is smaller than the sum of its proper divisors (105913057079948).

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

90699026780020 is a wasteful number, since it uses less digits than its factorization.

90699026780020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146288752911 (or 146288752909 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 90699026780020 in words is "ninety trillion, six hundred ninety-nine billion, twenty-six million, seven hundred eighty thousand, twenty".