20474100 has 72 divisors (see below), whose sum is σ = 65829120. Its totient is φ = 5459040.

The previous prime is 20474053. The next prime is 20474119. The reversal of 20474100 is 147402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1092 + ... + 6491.

Almost surely, 2^20474100 is an apocalyptic number.

20474100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20474100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32914560).

20474100 is an abundant number, since it is smaller than the sum of its proper divisors (45355020).

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

20474100 is a wasteful number, since it uses less digits than its factorization.

20474100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7606 (or 7593 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20474100 is about 4524.8314885750. The cubic root of 20474100 is about 273.5698758770.

The spelling of 20474100 in words is "twenty million, four hundred seventy-four thousand, one hundred".