20299140 has 48 divisors (see below), whose sum is σ = 63154560. Its totient is φ = 5412960.

The previous prime is 20299117. The next prime is 20299151. The reversal of 20299140 is 4199202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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, 18256 + ... + 19335.

It is an arithmetic number, because the mean of its divisors is an integer number (1315720).

Almost surely, 2^20299140 is an apocalyptic number.

20299140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20299140 is an abundant number, since it is smaller than the sum of its proper divisors (42855420).

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

20299140 is a wasteful number, since it uses less digits than its factorization.

20299140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37609 (or 37601 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 20299140 is about 4505.4566916130. The cubic root of 20299140 is about 272.7883881218.

The spelling of 20299140 in words is "twenty million, two hundred ninety-nine thousand, one hundred forty".