20474680 has 16 divisors (see below), whose sum is σ = 46068120. Its totient is φ = 8189856.

The previous prime is 20474677. The next prime is 20474683. The reversal of 20474680 is 8647402.

It is an interprime number because it is at equal distance from previous prime (20474677) and next prime (20474683).

It is a super-2 number, since 2×20474680² = 838425042204800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20474683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255894 + ... + 255973.

Almost surely, 2^20474680 is an apocalyptic number.

20474680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20474680 is an abundant number, since it is smaller than the sum of its proper divisors (25593440).

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

20474680 is a wasteful number, since it uses less digits than its factorization.

20474680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511878 (or 511874 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 20474680 is about 4524.8955789057. The cubic root of 20474680 is about 273.5724591249.

The spelling of 20474680 in words is "twenty million, four hundred seventy-four thousand, six hundred eighty".