20399058 has 48 divisors (see below), whose sum is σ = 45837792. Its totient is φ = 6552000.

The previous prime is 20399053. The next prime is 20399059. The reversal of 20399058 is 85099302.

It is a super-2 number, since 2×20399058² = 832243134574728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20399053) 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 23 ways as a sum of consecutive naturals, for example, 96573 + ... + 96783.

It is an arithmetic number, because the mean of its divisors is an integer number (954954).

Almost surely, 2^20399058 is an apocalyptic number.

20399058 is an abundant number, since it is smaller than the sum of its proper divisors (25438734).

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

20399058 is a wasteful number, since it uses less digits than its factorization.

20399058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 20399058 is about 4516.5316338979. The cubic root of 20399058 is about 273.2352358004.

The spelling of 20399058 in words is "twenty million, three hundred ninety-nine thousand, fifty-eight".