20133240990 has 16 divisors (see below), whose sum is σ = 48319778448. Its totient is φ = 5368864256.

The previous prime is 20133240989. The next prime is 20133241031. The reversal of 20133240990 is 9904233102.

It is a super-2 number, since 2×20133240990² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335553987 + ... + 335554046.

It is an arithmetic number, because the mean of its divisors is an integer number (3019986153).

Almost surely, 2^20133240990 is an apocalyptic number.

20133240990 is an abundant number, since it is smaller than the sum of its proper divisors (28186537458).

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

20133240990 is a wasteful number, since it uses less digits than its factorization.

20133240990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671108043.

The product of its (nonzero) digits is 11664, while the sum is 33.

The spelling of 20133240990 in words is "twenty billion, one hundred thirty-three million, two hundred forty thousand, nine hundred ninety".