20353023240 has 64 divisors (see below), whose sum is σ = 66609898560. Its totient is φ = 4934065920.

The previous prime is 20353023191. The next prime is 20353023253. The reversal of 20353023240 is 4232035302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20353023240.

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, 7708159 + ... + 7710798.

It is an arithmetic number, because the mean of its divisors is an integer number (1040779665).

Almost surely, 2^20353023240 is an apocalyptic number.

20353023240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20353023240 is an abundant number, since it is smaller than the sum of its proper divisors (46256875320).

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

20353023240 is a wasteful number, since it uses less digits than its factorization.

20353023240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15418982 (or 15418978 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 24.

Adding to 20353023240 its reverse (4232035302), we get a palindrome (24585058542).

The spelling of 20353023240 in words is "twenty billion, three hundred fifty-three million, twenty-three thousand, two hundred forty".