20495850 has 48 divisors (see below), whose sum is σ = 51344928. Its totient is φ = 5410240.

The previous prime is 20495843. The next prime is 20495861. The reversal of 20495850 is 5859402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15412 + ... + 16688.

It is an arithmetic number, because the mean of its divisors is an integer number (1069686).

Almost surely, 2^20495850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20495850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25672464).

20495850 is an abundant number, since it is smaller than the sum of its proper divisors (30849078).

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

20495850 is a wasteful number, since it uses less digits than its factorization.

20495850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399 (or 1394 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 20495850 is about 4527.2342550392. The cubic root of 20495850 is about 273.6667143064. Note that the first 3 decimals are identical.

The spelling of 20495850 in words is "twenty million, four hundred ninety-five thousand, eight hundred fifty".