20357380 has 24 divisors (see below), whose sum is σ = 42844032. Its totient is φ = 8125152.

The previous prime is 20357377. The next prime is 20357383. The reversal of 20357380 is 8375302.

It is an interprime number because it is at equal distance from previous prime (20357377) and next prime (20357383).

It is not an unprimeable number, because it can be changed into a prime (20357383) 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, 12069 + ... + 13651.

It is an arithmetic number, because the mean of its divisors is an integer number (1785168).

Almost surely, 2^20357380 is an apocalyptic number.

20357380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20357380 is an abundant number, since it is smaller than the sum of its proper divisors (22486652).

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

20357380 is a wasteful number, since it uses less digits than its factorization.

20357380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235 (or 2233 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20357380 is about 4511.9153360851. The cubic root of 20357380 is about 273.0490235639.

The spelling of 20357380 in words is "twenty million, three hundred fifty-seven thousand, three hundred eighty".