20353842 has 20 divisors (see below), whose sum is σ = 45608046. Its totient is φ = 6784560.

The previous prime is 20353813. The next prime is 20353849. The reversal of 20353842 is 24835302.

It can be written as a sum of positive squares in only one way, i.e., 19527561 + 826281 = 4419^2 + 909^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20353849) 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, 62659 + ... + 62982.

Almost surely, 2^20353842 is an apocalyptic number.

20353842 is an abundant number, since it is smaller than the sum of its proper divisors (25254204).

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

20353842 is a wasteful number, since it uses less digits than its factorization.

20353842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125655 (or 125646 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 20353842 is about 4511.5232460888. The cubic root of 20353842 is about 273.0332045109.

It can be divided in two parts, 203 and 53842, that added together give a palindrome (54045).

The spelling of 20353842 in words is "twenty million, three hundred fifty-three thousand, eight hundred forty-two".