20694739 has 8 divisors (see below), whose sum is σ = 22805552. Its totient is φ = 18658080.

The previous prime is 20694731. The next prime is 20694749. The reversal of 20694739 is 93749602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20694739 - 2³ = 20694731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20694731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17952 + ... + 19069.

It is an arithmetic number, because the mean of its divisors is an integer number (2850694).

Almost surely, 2^20694739 is an apocalyptic number.

20694739 is a deficient number, since it is larger than the sum of its proper divisors (2110813).

20694739 is a wasteful number, since it uses less digits than its factorization.

20694739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37077.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 20694739 is about 4549.1470629119. The cubic root of 20694739 is about 274.5490747835.

The spelling of 20694739 in words is "twenty million, six hundred ninety-four thousand, seven hundred thirty-nine".