20423736 has 48 divisors (see below), whose sum is σ = 55528200. Its totient is φ = 6781632.

The previous prime is 20423719. The next prime is 20423771. The reversal of 20423736 is 63732402.

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, 29830 + ... + 30506.

Almost surely, 2^20423736 is an apocalyptic number.

It is an amenable number.

20423736 is an abundant number, since it is smaller than the sum of its proper divisors (35104464).

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

20423736 is a wasteful number, since it uses less digits than its factorization.

20423736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108 (or 1101 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 20423736 is about 4519.2627717361. The cubic root of 20423736 is about 273.3453745769.

It can be divided in two parts, 2042 and 3736, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 20423736 in words is "twenty million, four hundred twenty-three thousand, seven hundred thirty-six".