20002860 has 36 divisors (see below), whose sum is σ = 60675888. Its totient is φ = 5334048.

The previous prime is 20002841. The next prime is 20002907. The reversal of 20002860 is 6820002.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×20002860² = 800228816359200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

20002860 is a modest number, since divided by 2860 gives 20 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55384 + ... + 55743.

Almost surely, 2^20002860 is an apocalyptic number.

20002860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002860 is an abundant number, since it is smaller than the sum of its proper divisors (40673028).

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

20002860 is a wasteful number, since it uses less digits than its factorization.

20002860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111142 (or 111137 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20002860 is about 4472.4557012898. The cubic root of 20002860 is about 271.4546997668.

Adding to 20002860 its reverse (6820002), we get a palindrome (26822862).

The spelling of 20002860 in words is "twenty million, two thousand, eight hundred sixty".