20742606 has 12 divisors (see below), whose sum is σ = 44942352. Its totient is φ = 6914196.

The previous prime is 20742593. The next prime is 20742637. The reversal of 20742606 is 60624702.

It is a self number, because there is not a number n which added to its sum of digits gives 20742606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 576166 + ... + 576201.

It is an arithmetic number, because the mean of its divisors is an integer number (3745196).

Almost surely, 2^20742606 is an apocalyptic number.

20742606 is an abundant number, since it is smaller than the sum of its proper divisors (24199746).

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

20742606 is a wasteful number, since it uses less digits than its factorization.

20742606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152375 (or 1152372 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20742606 is about 4554.4051203203. The cubic root of 20742606 is about 274.7605894296.

The spelling of 20742606 in words is "twenty million, seven hundred forty-two thousand, six hundred six".