20743478 has 16 divisors (see below), whose sum is σ = 37432320. Its totient is φ = 8422056.

The previous prime is 20743469. The next prime is 20743483. The reversal of 20743478 is 87434702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38726 + ... + 39257.

It is an arithmetic number, because the mean of its divisors is an integer number (2339520).

Almost surely, 2^20743478 is an apocalyptic number.

20743478 is a deficient number, since it is larger than the sum of its proper divisors (16688842).

20743478 is a wasteful number, since it uses less digits than its factorization.

20743478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78011.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 20743478 is about 4554.5008508068. The cubic root of 20743478 is about 274.7644396028.

The spelling of 20743478 in words is "twenty million, seven hundred forty-three thousand, four hundred seventy-eight".