20353518 has 20 divisors (see below), whose sum is σ = 45607320. Its totient is φ = 6784452.

The previous prime is 20353511. The next prime is 20353519. The reversal of 20353518 is 81535302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20353491 and 20353500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353511) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 62658 + ... + 62981.

It is an arithmetic number, because the mean of its divisors is an integer number (2280366).

Almost surely, 2^20353518 is an apocalyptic number.

20353518 is an abundant number, since it is smaller than the sum of its proper divisors (25253802).

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

20353518 is a wasteful number, since it uses less digits than its factorization.

20353518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125653 (or 125644 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 20353518 is about 4511.4873378965. The cubic root of 20353518 is about 273.0317557553.

The spelling of 20353518 in words is "twenty million, three hundred fifty-three thousand, five hundred eighteen".