21034505432 has 16 divisors (see below), whose sum is σ = 39727580760. Its totient is φ = 10440483904.

The previous prime is 21034505413. The next prime is 21034505483. The reversal of 21034505432 is 23450543012.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21034505395 and 21034505404.

It is a congruent 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, 9594938 + ... + 9597129.

Almost surely, 2^21034505432 is an apocalyptic number.

It is an amenable number.

21034505432 is a deficient number, since it is larger than the sum of its proper divisors (18693075328).

21034505432 is a wasteful number, since it uses less digits than its factorization.

21034505432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19192210 (or 19192206 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 21034505432 in words is "twenty-one billion, thirty-four million, five hundred five thousand, four hundred thirty-two".