21132303774 has 16 divisors (see below), whose sum is σ = 42270147840. Its totient is φ = 7043177880.

The previous prime is 21132303767. The next prime is 21132303793. The reversal of 21132303774 is 47730323112.

It is a super-2 number, since 2×21132303774² (a number of 21 digits) contains 22 as substring.

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, 180412 + ... + 273519.

It is an arithmetic number, because the mean of its divisors is an integer number (2641884240).

Almost surely, 2^21132303774 is an apocalyptic number.

21132303774 is an abundant number, since it is smaller than the sum of its proper divisors (21137844066).

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

21132303774 is a wasteful number, since it uses less digits than its factorization.

21132303774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461695.

The product of its (nonzero) digits is 21168, while the sum is 33.

Adding to 21132303774 its reverse (47730323112), we get a palindrome (68862626886).

The spelling of 21132303774 in words is "twenty-one billion, one hundred thirty-two million, three hundred three thousand, seven hundred seventy-four".