20835490 has 32 divisors (see below), whose sum is σ = 40896576. Its totient is φ = 7596480.

The previous prime is 20835469. The next prime is 20835491. The reversal of 20835490 is 9453802.

It is not an unprimeable number, because it can be changed into a prime (20835491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9825 + ... + 11755.

It is an arithmetic number, because the mean of its divisors is an integer number (1278018).

Almost surely, 2^20835490 is an apocalyptic number.

20835490 is a deficient number, since it is larger than the sum of its proper divisors (20061086).

20835490 is a wasteful number, since it uses less digits than its factorization.

20835490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20835490 is about 4564.5908907590. The cubic root of 20835490 is about 275.1700986222.

The spelling of 20835490 in words is "twenty million, eight hundred thirty-five thousand, four hundred ninety".