20707942 has 8 divisors (see below), whose sum is σ = 31285800. Its totient is φ = 10279344.

The previous prime is 20707937. The next prime is 20707949. The reversal of 20707942 is 24970702.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20707949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36967 + ... + 37522.

It is an arithmetic number, because the mean of its divisors is an integer number (3910725).

Almost surely, 2^20707942 is an apocalyptic number.

20707942 is a deficient number, since it is larger than the sum of its proper divisors (10577858).

20707942 is a wasteful number, since it uses less digits than its factorization.

20707942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74630.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20707942 is about 4550.5979826832. The cubic root of 20707942 is about 274.6074487311.

The spelling of 20707942 in words is "twenty million, seven hundred seven thousand, nine hundred forty-two".