20349400 has 24 divisors (see below), whose sum is σ = 47312820. Its totient is φ = 8139680.

The previous prime is 20349389. The next prime is 20349421. The reversal of 20349400 is 494302.

It is a super-3 number, since 3×20349400³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50674 + ... + 51073.

Almost surely, 2^20349400 is an apocalyptic number.

20349400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20349400 is an abundant number, since it is smaller than the sum of its proper divisors (26963420).

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

20349400 is a wasteful number, since it uses less digits than its factorization.

20349400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101763 (or 101754 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20349400 is about 4511.0309243010. The cubic root of 20349400 is about 273.0133409108.

The spelling of 20349400 in words is "twenty million, three hundred forty-nine thousand, four hundred".