20711742 has 16 divisors (see below), whose sum is σ = 42852240. Its totient is φ = 6665792.

The previous prime is 20711723. The next prime is 20711783. The reversal of 20711742 is 24711702.

It is a congruent number.

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, 59343 + ... + 59690.

It is an arithmetic number, because the mean of its divisors is an integer number (2678265).

Almost surely, 2^20711742 is an apocalyptic number.

20711742 is an abundant number, since it is smaller than the sum of its proper divisors (22140498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20711742 is a wasteful number, since it uses less digits than its factorization.

20711742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119067.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 20711742 is about 4551.0154910745. The cubic root of 20711742 is about 274.6242449356.

The spelling of 20711742 in words is "twenty million, seven hundred eleven thousand, seven hundred forty-two".