90202020209 has 8 divisors (see below), whose sum is σ = 104108697408. Its totient is φ = 76550511600.

The previous prime is 90202020199. The next prime is 90202020211.

90202020209 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90202020209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90202020229) 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, 63791387 + ... + 63792800.

It is an arithmetic number, because the mean of its divisors is an integer number (13013587176).

Almost surely, 2^90202020209 is an apocalyptic number.

It is an amenable number.

90202020209 is a deficient number, since it is larger than the sum of its proper divisors (13906677199).

90202020209 is a wasteful number, since it uses less digits than its factorization.

90202020209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127584295.

The product of its (nonzero) digits is 1296, while the sum is 26.

It can be divided in two parts, 902020 and 20209, that added together give a palindrome (922229).

The spelling of 90202020209 in words is "ninety billion, two hundred two million, twenty thousand, two hundred nine".