20739394 has 16 divisors (see below), whose sum is σ = 33683832. Its totient is φ = 9520128.

The previous prime is 20739347. The next prime is 20739421. The reversal of 20739394 is 49393702.

It can be written as a sum of positive squares in 4 ways, for example, as 14160169 + 6579225 = 3763^2 + 2565^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2952 + ... + 7084.

Almost surely, 2^20739394 is an apocalyptic number.

20739394 is a deficient number, since it is larger than the sum of its proper divisors (12944438).

20739394 is a wasteful number, since it uses less digits than its factorization.

20739394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 20739394 is about 4554.0524810327. The cubic root of 20739394 is about 274.7464064388.

It can be divided in two parts, 207 and 39394, that added together give a square (39601 = 199²).

The spelling of 20739394 in words is "twenty million, seven hundred thirty-nine thousand, three hundred ninety-four".