20378860 has 24 divisors (see below), whose sum is σ = 43953840. Its totient is φ = 7930944.

The previous prime is 20378837. The next prime is 20378863. The reversal of 20378860 is 6887302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20378863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13030 + ... + 14509.

It is an arithmetic number, because the mean of its divisors is an integer number (1831410).

Almost surely, 2^20378860 is an apocalyptic number.

20378860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20378860 is an abundant number, since it is smaller than the sum of its proper divisors (23574980).

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

20378860 is a wasteful number, since it uses less digits than its factorization.

20378860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27585 (or 27583 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20378860 is about 4514.2950723230. The cubic root of 20378860 is about 273.1450252987.

The spelling of 20378860 in words is "twenty million, three hundred seventy-eight thousand, eight hundred sixty".