20739699 has 16 divisors (see below), whose sum is σ = 30935040. Its totient is φ = 13732200.

The previous prime is 20739689. The next prime is 20739701. The reversal of 20739699 is 99693702.

It is not a de Polignac number, because 20739699 - 2⁷ = 20739571 is a prime.

It is a super-2 number, since 2×20739699² = 860270229221202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20739619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1534 + ... + 6620.

It is an arithmetic number, because the mean of its divisors is an integer number (1933440).

Almost surely, 2^20739699 is an apocalyptic number.

20739699 is a deficient number, since it is larger than the sum of its proper divisors (10195341).

20739699 is a wasteful number, since it uses less digits than its factorization.

20739699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5247 (or 5241 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 20739699 is about 4554.0859675680. The cubic root of 20739699 is about 274.7477532677.

The spelling of 20739699 in words is "twenty million, seven hundred thirty-nine thousand, six hundred ninety-nine".