21430433120 has 48 divisors (see below), whose sum is σ = 51487546320. Its totient is φ = 8426878464.

The previous prime is 21430433117. The next prime is 21430433153. The reversal of 21430433120 is 2133403412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1125647 + ... + 1144526.

It is an arithmetic number, because the mean of its divisors is an integer number (1072657215).

Almost surely, 2^21430433120 is an apocalyptic number.

21430433120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21430433120 is an abundant number, since it is smaller than the sum of its proper divisors (30057113200).

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

21430433120 is a wasteful number, since it uses less digits than its factorization.

21430433120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270247 (or 2270239 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21430433120 its reverse (2133403412), we get a palindrome (23563836532).

The spelling of 21430433120 in words is "twenty-one billion, four hundred thirty million, four hundred thirty-three thousand, one hundred twenty".