1005542020 has 48 divisors (see below), whose sum is σ = 2443875840. Its totient is φ = 340389504.

The previous prime is 1005541981. The next prime is 1005542059. The reversal of 1005542020 is 202455001.

It is an interprime number because it is at equal distance from previous prime (1005541981) and next prime (1005542059).

It is a super-2 number, since 2×1005542020² = 2022229507971360800, which contains 22 as substring.

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, 34399 + ... + 56518.

It is an arithmetic number, because the mean of its divisors is an integer number (50914080).

Almost surely, 2^1005542020 is an apocalyptic number.

1005542020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1005542020 is an abundant number, since it is smaller than the sum of its proper divisors (1438333820).

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

1005542020 is a wasteful number, since it uses less digits than its factorization.

1005542020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91012 (or 91010 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1005542020 is about 31710.2825594475. The cubic root of 1005542020 is about 1001.8439378035.

Adding to 1005542020 its reverse (202455001), we get a palindrome (1207997021).

The spelling of 1005542020 in words is "one billion, five million, five hundred forty-two thousand, twenty".