21430708626 has 8 divisors (see below), whose sum is σ = 42861417264. Its totient is φ = 7143569540.

The previous prime is 21430708609. The next prime is 21430708669. The reversal of 21430708626 is 62680703412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21430708626 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785892380 + ... + 1785892391.

It is an arithmetic number, because the mean of its divisors is an integer number (5357677158).

Almost surely, 2^21430708626 is an apocalyptic number.

21430708626 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21430708626 is a wasteful number, since it uses less digits than its factorization.

21430708626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571784776.

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 21430708626 in words is "twenty-one billion, four hundred thirty million, seven hundred eight thousand, six hundred twenty-six".