21059692 has 6 divisors (see below), whose sum is σ = 36854468. Its totient is φ = 10529844.

The previous prime is 21059677. The next prime is 21059711. The reversal of 21059692 is 29695012.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2632458 + ... + 2632465.

Almost surely, 2^21059692 is an apocalyptic number.

It is an amenable number.

21059692 is a deficient number, since it is larger than the sum of its proper divisors (15794776).

21059692 is a wasteful number, since it uses less digits than its factorization.

21059692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5264927 (or 5264925 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 21059692 is about 4589.0840044610. The cubic root of 21059692 is about 276.1535762246.

The spelling of 21059692 in words is "twenty-one million, fifty-nine thousand, six hundred ninety-two".