20197400 has 24 divisors (see below), whose sum is σ = 46959420. Its totient is φ = 8078880.

The previous prime is 20197391. The next prime is 20197417. The reversal of 20197400 is 479102.

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, 50294 + ... + 50693.

Almost surely, 2^20197400 is an apocalyptic number.

20197400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20197400 is an abundant number, since it is smaller than the sum of its proper divisors (26762020).

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

20197400 is a wasteful number, since it uses less digits than its factorization.

20197400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101003 (or 100994 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 20197400 is about 4494.1517553372. The cubic root of 20197400 is about 272.3318829480.

The spelling of 20197400 in words is "twenty million, one hundred ninety-seven thousand, four hundred".