21430412734 has 16 divisors (see below), whose sum is σ = 32278825440. Its totient is φ = 10670849280.

The previous prime is 21430412699. The next prime is 21430412749. The reversal of 21430412734 is 43721403412.

It is a junction number, because it is equal to n+sod(n) for n = 21430412696 and 21430412705.

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, 1042447 + ... + 1062805.

It is an arithmetic number, because the mean of its divisors is an integer number (2017426590).

Almost surely, 2^21430412734 is an apocalyptic number.

21430412734 is a deficient number, since it is larger than the sum of its proper divisors (10848412706).

21430412734 is a wasteful number, since it uses less digits than its factorization.

21430412734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22515.

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 21430412734 in words is "twenty-one billion, four hundred thirty million, four hundred twelve thousand, seven hundred thirty-four".