20513842 has 8 divisors (see below), whose sum is σ = 30917232. Its totient is φ = 10208100.

The previous prime is 20513839. The next prime is 20513879. The reversal of 20513842 is 24831502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23884 + ... + 24727.

It is an arithmetic number, because the mean of its divisors is an integer number (3864654).

Almost surely, 2^20513842 is an apocalyptic number.

20513842 is a deficient number, since it is larger than the sum of its proper divisors (10403390).

20513842 is a wasteful number, since it uses less digits than its factorization.

20513842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48824.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20513842 is about 4529.2209043057. The cubic root of 20513842 is about 273.7467690729.

The spelling of 20513842 in words is "twenty million, five hundred thirteen thousand, eight hundred forty-two".