20276140 has 48 divisors (see below), whose sum is σ = 44311680. Its totient is φ = 7787520.

The previous prime is 20276131. The next prime is 20276141. The reversal of 20276140 is 4167202.

It is a super-2 number, since 2×20276140² = 822243706599200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20276141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64624 + ... + 64936.

It is an arithmetic number, because the mean of its divisors is an integer number (923160).

Almost surely, 2^20276140 is an apocalyptic number.

20276140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20276140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22155840).

20276140 is an abundant number, since it is smaller than the sum of its proper divisors (24035540).

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

20276140 is a wasteful number, since it uses less digits than its factorization.

20276140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20276140 is about 4502.9035077381. The cubic root of 20276140 is about 272.6853212914.

The spelling of 20276140 in words is "twenty million, two hundred seventy-six thousand, one hundred forty".