20742910 has 16 divisors (see below), whose sum is σ = 37633536. Its totient is φ = 8231328.

The previous prime is 20742901. The next prime is 20742919. The reversal of 20742910 is 1924702.

It is an interprime number because it is at equal distance from previous prime (20742901) and next prime (20742919).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20742919) 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, 6897 + ... + 9436.

It is an arithmetic number, because the mean of its divisors is an integer number (2352096).

Almost surely, 2^20742910 is an apocalyptic number.

20742910 is a deficient number, since it is larger than the sum of its proper divisors (16890626).

20742910 is a wasteful number, since it uses less digits than its factorization.

20742910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16467.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20742910 is about 4554.4384944799. The cubic root of 20742910 is about 274.7619317041.

The spelling of 20742910 in words is "twenty million, seven hundred forty-two thousand, nine hundred ten".