20675400 has 96 divisors (see below), whose sum is σ = 67897440. Its totient is φ = 5186560.

The previous prime is 20675399. The next prime is 20675423. The reversal of 20675400 is 457602.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 9187 + ... + 11213.

It is an arithmetic number, because the mean of its divisors is an integer number (707265).

Almost surely, 2^20675400 is an apocalyptic number.

20675400 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 20675400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33948720).

20675400 is an abundant number, since it is smaller than the sum of its proper divisors (47222040).

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

20675400 is a wasteful number, since it uses less digits than its factorization.

20675400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063 (or 2054 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20675400 is about 4547.0210028105. The cubic root of 20675400 is about 274.4635271264.

The spelling of 20675400 in words is "twenty million, six hundred seventy-five thousand, four hundred".