20637742 has 16 divisors (see below), whose sum is σ = 31601232. Its totient is φ = 10105920.

The previous prime is 20637737. The next prime is 20637751. The reversal of 20637742 is 24773602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30892 + ... + 31552.

It is an arithmetic number, because the mean of its divisors is an integer number (1975077).

Almost surely, 2^20637742 is an apocalyptic number.

20637742 is a deficient number, since it is larger than the sum of its proper divisors (10963490).

20637742 is a wasteful number, since it uses less digits than its factorization.

20637742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20637742 is about 4542.8781625749. The cubic root of 20637742 is about 274.2967906665.

The spelling of 20637742 in words is "twenty million, six hundred thirty-seven thousand, seven hundred forty-two".