20463428 has 12 divisors (see below), whose sum is σ = 36684732. Its totient is φ = 9982080.

The previous prime is 20463409. The next prime is 20463451. The reversal of 20463428 is 82436402.

It can be written as a sum of positive squares in 2 ways, for example, as 6190144 + 14273284 = 2488^2 + 3778^2 .

It is a super-2 number, since 2×20463428² = 837503771022368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20463428.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62225 + ... + 62552.

It is an arithmetic number, because the mean of its divisors is an integer number (3057061).

Almost surely, 2^20463428 is an apocalyptic number.

It is an amenable number.

20463428 is a deficient number, since it is larger than the sum of its proper divisors (16221304).

20463428 is a wasteful number, since it uses less digits than its factorization.

20463428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124822 (or 124820 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 20463428 is about 4523.6520644276. The cubic root of 20463428 is about 273.5223354051.

The spelling of 20463428 in words is "twenty million, four hundred sixty-three thousand, four hundred twenty-eight".