20353725 has 36 divisors (see below), whose sum is σ = 41666976. Its totient is φ = 9303840.

The previous prime is 20353721. The next prime is 20353733. The reversal of 20353725 is 52735302.

It is not a de Polignac number, because 20353725 - 2² = 20353721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353721) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4887 + ... + 8036.

It is an arithmetic number, because the mean of its divisors is an integer number (1157416).

Almost surely, 2^20353725 is an apocalyptic number.

20353725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20353725 is an abundant number, since it is smaller than the sum of its proper divisors (21313251).

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

20353725 is a wasteful number, since it uses less digits than its factorization.

20353725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12946 (or 12938 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 20353725 is about 4511.5102792746. The cubic root of 20353725 is about 273.0326813510.

The spelling of 20353725 in words is "twenty million, three hundred fifty-three thousand, seven hundred twenty-five".