253705020 has 48 divisors (see below), whose sum is σ = 711559968. Its totient is φ = 67541760.

The previous prime is 253705009. The next prime is 253705033. The reversal of 253705020 is 20507352.

It is a congruent number.

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, 36462 + ... + 42858.

It is an arithmetic number, because the mean of its divisors is an integer number (14824166).

Almost surely, 2^253705020 is an apocalyptic number.

253705020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253705020 is an abundant number, since it is smaller than the sum of its proper divisors (457854948).

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

253705020 is a wasteful number, since it uses less digits than its factorization.

253705020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7070 (or 7068 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 253705020 is about 15928.1204164208. The cubic root of 253705020 is about 633.0572986074.

The spelling of 253705020 in words is "two hundred fifty-three million, seven hundred five thousand, twenty".