90209206662420 has 24 divisors (see below), whose sum is σ = 252585778654944. Its totient is φ = 24055788443296.

The previous prime is 90209206662361. The next prime is 90209206662433. The reversal of 90209206662420 is 2426660290209.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90209206662420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 751743388794 + ... + 751743388913.

It is an arithmetic number, because the mean of its divisors is an integer number (10524407443956).

Almost surely, 2^{90209206662420} is an apocalyptic number.

It is an amenable number.

90209206662420 is an abundant number, since it is smaller than the sum of its proper divisors (162376571992524).

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

90209206662420 is a wasteful number, since it uses less digits than its factorization.

90209206662420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503486777719 (or 1503486777717 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 90209206662420 in words is "ninety trillion, two hundred nine billion, two hundred six million, six hundred sixty-two thousand, four hundred twenty".