20678748 has 24 divisors (see below), whose sum is σ = 50348928. Its totient is φ = 6593136.

The previous prime is 20678741. The next prime is 20678807. The reversal of 20678748 is 84787602.

It is a super-2 number, since 2×20678748² = 855221237695008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20678741) 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, 37186 + ... + 37737.

It is an arithmetic number, because the mean of its divisors is an integer number (2097872).

Almost surely, 2^20678748 is an apocalyptic number.

It is an amenable number.

20678748 is an abundant number, since it is smaller than the sum of its proper divisors (29670180).

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

20678748 is a wasteful number, since it uses less digits than its factorization.

20678748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74953 (or 74951 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 20678748 is about 4547.3891410347. The cubic root of 20678748 is about 274.4783410969.

The spelling of 20678748 in words is "twenty million, six hundred seventy-eight thousand, seven hundred forty-eight".