20474400 has 144 divisors (see below), whose sum is σ = 70308000. Its totient is φ = 5160960.

The previous prime is 20474371. The next prime is 20474411. The reversal of 20474400 is 447402.

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, 45376 + ... + 45824.

It is an arithmetic number, because the mean of its divisors is an integer number (488250).

Almost surely, 2^20474400 is an apocalyptic number.

20474400 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 20474400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35154000).

20474400 is an abundant number, since it is smaller than the sum of its proper divisors (49833600).

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

20474400 is a wasteful number, since it uses less digits than its factorization.

20474400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 20474400 is about 4524.8646388594. The cubic root of 20474400 is about 273.5712120458.

The spelling of 20474400 in words is "twenty million, four hundred seventy-four thousand, four hundred".