21761465430 has 16 divisors (see below), whose sum is σ = 52227517104. Its totient is φ = 5803057440.

The previous prime is 21761465399. The next prime is 21761465431. The reversal of 21761465430 is 3456416712.

It is a happy number.

It is a super-2 number, since 2×21761465430² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21761465431) 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, 362691061 + ... + 362691120.

It is an arithmetic number, because the mean of its divisors is an integer number (3264219819).

Almost surely, 2^21761465430 is an apocalyptic number.

21761465430 is an abundant number, since it is smaller than the sum of its proper divisors (30466051674).

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

21761465430 is a wasteful number, since it uses less digits than its factorization.

21761465430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725382191.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 21761465430 in words is "twenty-one billion, seven hundred sixty-one million, four hundred sixty-five thousand, four hundred thirty".