20701239 has 16 divisors (see below), whose sum is σ = 30105600. Its totient is φ = 12576096.

The previous prime is 20701237. The next prime is 20701243. The reversal of 20701239 is 93210702.

It is not a de Polignac number, because 20701239 - 2¹ = 20701237 is a prime.

It is a super-2 number, since 2×20701239² = 857082592270242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20701237) 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, 279 + ... + 6440.

It is an arithmetic number, because the mean of its divisors is an integer number (1881600).

Almost surely, 2^20701239 is an apocalyptic number.

20701239 is a deficient number, since it is larger than the sum of its proper divisors (9404361).

20701239 is a wasteful number, since it uses less digits than its factorization.

20701239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6814.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 20701239 is about 4549.8614264612. The cubic root of 20701239 is about 274.5778161008.

The spelling of 20701239 in words is "twenty million, seven hundred one thousand, two hundred thirty-nine".