20378190 has 32 divisors (see below), whose sum is σ = 55895040. Its totient is φ = 4657824.

The previous prime is 20378179. The next prime is 20378201. The reversal of 20378190 is 9187302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20378179) and next prime (20378201).

It is a super-2 number, since 2×20378190² = 830541255352200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48310 + ... + 48729.

It is an arithmetic number, because the mean of its divisors is an integer number (1746720).

Almost surely, 2^20378190 is an apocalyptic number.

20378190 is an abundant number, since it is smaller than the sum of its proper divisors (35516850).

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

20378190 is a wasteful number, since it uses less digits than its factorization.

20378190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97056.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 20378190 is about 4514.2208630062. The cubic root of 20378190 is about 273.1420318507.

The spelling of 20378190 in words is "twenty million, three hundred seventy-eight thousand, one hundred ninety".