1020291020 has 48 divisors (see below), whose sum is σ = 2454375168. Its totient is φ = 349003200.

The previous prime is 1020290981. The next prime is 1020291037. The reversal of 1020291020 is 201920201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020291020.

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, 53795 + ... + 70245.

It is an arithmetic number, because the mean of its divisors is an integer number (51132816).

Almost surely, 2^1020291020 is an apocalyptic number.

1020291020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020291020 is an abundant number, since it is smaller than the sum of its proper divisors (1434084148).

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

1020291020 is a wasteful number, since it uses less digits than its factorization.

1020291020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16910 (or 16908 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1020291020 is about 31941.9946152397. The cubic root of 1020291020 is about 1006.7184348819.

The spelling of 1020291020 in words is "one billion, twenty million, two hundred ninety-one thousand, twenty".