20883400 has 24 divisors (see below), whose sum is σ = 48554370. Its totient is φ = 8353280.

The previous prime is 20883383. The next prime is 20883403. The reversal of 20883400 is 438802.

It can be written as a sum of positive squares in 3 ways, for example, as 11847364 + 9036036 = 3442^2 + 3006^2 .

It is a super-2 number, since 2×20883400² = 872232791120000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (20883403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52009 + ... + 52408.

Almost surely, 2^20883400 is an apocalyptic number.

20883400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20883400 is an abundant number, since it is smaller than the sum of its proper divisors (27670970).

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

20883400 is a wasteful number, since it uses less digits than its factorization.

20883400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104433 (or 104424 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 20883400 is about 4569.8358832676. The cubic root of 20883400 is about 275.3808497251.

The spelling of 20883400 in words is "twenty million, eight hundred eighty-three thousand, four hundred".