1255693020 has 24 divisors (see below), whose sum is σ = 3515940624. Its totient is φ = 334851456.

The previous prime is 1255693003. The next prime is 1255693063. The reversal of 1255693020 is 203965521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10464049 + ... + 10464168.

It is an arithmetic number, because the mean of its divisors is an integer number (146497526).

Almost surely, 2^1255693020 is an apocalyptic number.

1255693020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255693020 is an abundant number, since it is smaller than the sum of its proper divisors (2260247604).

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

1255693020 is a wasteful number, since it uses less digits than its factorization.

1255693020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20928229 (or 20928227 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 1255693020 is about 35435.7590577654. The cubic root of 1255693020 is about 1078.8502338713.

The spelling of 1255693020 in words is "one billion, two hundred fifty-five million, six hundred ninety-three thousand, twenty".