20463728 has 10 divisors (see below), whose sum is σ = 39648504. Its totient is φ = 10231856.

The previous prime is 20463683. The next prime is 20463739. The reversal of 20463728 is 82736402.

It is a junction number, because it is equal to n+sod(n) for n = 20463694 and 20463703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639476 + ... + 639507.

Almost surely, 2^20463728 is an apocalyptic number.

It is an amenable number.

20463728 is a deficient number, since it is larger than the sum of its proper divisors (19184776).

20463728 is a wasteful number, since it uses less digits than its factorization.

20463728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278991 (or 1278985 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20463728 is about 4523.6852233550. The cubic root of 20463728 is about 273.5236720384.

The spelling of 20463728 in words is "twenty million, four hundred sixty-three thousand, seven hundred twenty-eight".