20743738 has 16 divisors (see below), whose sum is σ = 31570560. Its totient is φ = 10221616.

The previous prime is 20743711. The next prime is 20743739. The reversal of 20743738 is 83734702.

It is not an unprimeable number, because it can be changed into a prime (20743739) 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, 57603 + ... + 57961.

It is an arithmetic number, because the mean of its divisors is an integer number (1973160).

Almost surely, 2^20743738 is an apocalyptic number.

20743738 is a deficient number, since it is larger than the sum of its proper divisors (10826822).

20743738 is a wasteful number, since it uses less digits than its factorization.

20743738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 20743738 is about 4554.5293939111. The cubic root of 20743738 is about 274.7655875694.

The spelling of 20743738 in words is "twenty million, seven hundred forty-three thousand, seven hundred thirty-eight".