20706442 has 16 divisors (see below), whose sum is σ = 33046272. Its totient is φ = 9696960.

The previous prime is 20706431. The next prime is 20706449. The reversal of 20706442 is 24460702.

It is not an unprimeable number, because it can be changed into a prime (20706449) 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, 6217 + ... + 8947.

It is an arithmetic number, because the mean of its divisors is an integer number (2065392).

Almost surely, 2^20706442 is an apocalyptic number.

20706442 is a deficient number, since it is larger than the sum of its proper divisors (12339830).

20706442 is a wasteful number, since it uses less digits than its factorization.

20706442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20706442 is about 4550.4331661942. The cubic root of 20706442 is about 274.6008180848.

The spelling of 20706442 in words is "twenty million, seven hundred six thousand, four hundred forty-two".