20533400 has 24 divisors (see below), whose sum is σ = 47740620. Its totient is φ = 8213280.

The previous prime is 20533391. The next prime is 20533427. The reversal of 20533400 is 433502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51134 + ... + 51533.

Almost surely, 2^20533400 is an apocalyptic number.

20533400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20533400 is an abundant number, since it is smaller than the sum of its proper divisors (27207220).

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

20533400 is a wasteful number, since it uses less digits than its factorization.

20533400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102683 (or 102674 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 20533400 is about 4531.3794809087. The cubic root of 20533400 is about 273.8337386212.

Adding to 20533400 its reverse (433502), we get a palindrome (20966902).

The spelling of 20533400 in words is "twenty million, five hundred thirty-three thousand, four hundred".