22021202001990 has 64 divisors (see below), whose sum is σ = 53378230606272. Its totient is φ = 5813735424000.

The previous prime is 22021202001989. The next prime is 22021202002021. The reversal of 22021202001990 is 9910020212022.

It is a super-2 number, since 2×22021202001990² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40455874 + ... + 40996586.

It is an arithmetic number, because the mean of its divisors is an integer number (834034853223).

Almost surely, 2^{22021202001990} is an apocalyptic number.

22021202001990 is an abundant number, since it is smaller than the sum of its proper divisors (31357028604282).

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

22021202001990 is a wasteful number, since it uses less digits than its factorization.

22021202001990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554265.

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 22021202001990 in words is "twenty-two trillion, twenty-one billion, two hundred two million, one thousand, nine hundred ninety".