21692703 has 12 divisors (see below), whose sum is σ = 30238040. Its totient is φ = 13832016.

The previous prime is 21692681. The next prime is 21692729. The reversal of 21692703 is 30729612.

It is not a de Polignac number, because 21692703 - 2⁶ = 21692639 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21692773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5248 + ... + 8421.

Almost surely, 2^21692703 is an apocalyptic number.

21692703 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21692703 is a deficient number, since it is larger than the sum of its proper divisors (8545337).

21692703 is a wasteful number, since it uses less digits than its factorization.

21692703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13718 (or 13695 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 21692703 is about 4657.5425923978. The cubic root of 21692703 is about 278.8931773322.

The spelling of 21692703 in words is "twenty-one million, six hundred ninety-two thousand, seven hundred three".