21461100430 has 32 divisors (see below), whose sum is σ = 48162055680. Its totient is φ = 6689173920.

The previous prime is 21461100413. The next prime is 21461100449. The reversal of 21461100430 is 3400116412.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13935010 + ... + 13936549.

It is an arithmetic number, because the mean of its divisors is an integer number (1505064240).

Almost surely, 2^21461100430 is an apocalyptic number.

21461100430 is an abundant number, since it is smaller than the sum of its proper divisors (26700955250).

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

21461100430 is a wasteful number, since it uses less digits than its factorization.

21461100430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27871584.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21461100430 its reverse (3400116412), we get a palindrome (24861216842).

The spelling of 21461100430 in words is "twenty-one billion, four hundred sixty-one million, one hundred thousand, four hundred thirty".