20283980 has 12 divisors (see below), whose sum is σ = 42596400. Its totient is φ = 8113584.

The previous prime is 20283979. The next prime is 20283983. The reversal of 20283980 is 8938202.

It is a happy number.

It is a super-2 number, since 2×20283980² = 822879689280800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20283983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507080 + ... + 507119.

It is an arithmetic number, because the mean of its divisors is an integer number (3549700).

Almost surely, 2^20283980 is an apocalyptic number.

20283980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20283980 is an abundant number, since it is smaller than the sum of its proper divisors (22312420).

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

20283980 is a wasteful number, since it uses less digits than its factorization.

20283980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014208 (or 1014206 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 20283980 is about 4503.7739730142. The cubic root of 20283980 is about 272.7204623889.

The spelling of 20283980 in words is "twenty million, two hundred eighty-three thousand, nine hundred eighty".