20768742 has 24 divisors (see below), whose sum is σ = 46047144. Its totient is φ = 6761664.

The previous prime is 20768717. The next prime is 20768753. The reversal of 20768742 is 24786702.

It is a junction number, because it is equal to n+sod(n) for n = 20768697 and 20768706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12643 + ... + 14190.

It is an arithmetic number, because the mean of its divisors is an integer number (1918631).

Almost surely, 2^20768742 is an apocalyptic number.

20768742 is an abundant number, since it is smaller than the sum of its proper divisors (25278402).

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

20768742 is a wasteful number, since it uses less digits than its factorization.

20768742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26884 (or 26881 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 20768742 is about 4557.2735270115. The cubic root of 20768742 is about 274.8759418394.

The spelling of 20768742 in words is "twenty million, seven hundred sixty-eight thousand, seven hundred forty-two".