1981946202 has 64 divisors (see below), whose sum is σ = 4368798720. Its totient is φ = 596623104.

The previous prime is 1981946201. The next prime is 1981946203. The reversal of 1981946202 is 2026491891.

It is an interprime number because it is at equal distance from previous prime (1981946201) and next prime (1981946203).

It is a super-2 number, since 2×1981946202² = 7856221495244449608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1981946201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 882493 + ... + 884735.

It is an arithmetic number, because the mean of its divisors is an integer number (68262480).

Almost surely, 2^1981946202 is an apocalyptic number.

1981946202 is an abundant number, since it is smaller than the sum of its proper divisors (2386852518).

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

1981946202 is a wasteful number, since it uses less digits than its factorization.

1981946202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1981946202 is about 44519.0543700111. The cubic root of 1981946202 is about 1256.1185251482.

The spelling of 1981946202 in words is "one billion, nine hundred eighty-one million, nine hundred forty-six thousand, two hundred two".