20835996 has 36 divisors (see below), whose sum is σ = 49809816. Its totient is φ = 6776640.

The previous prime is 20835977. The next prime is 20836009. The reversal of 20835996 is 69953802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115026 + ... + 115206.

It is an arithmetic number, because the mean of its divisors is an integer number (1383606).

Almost surely, 2^20835996 is an apocalyptic number.

It is an amenable number.

20835996 is an abundant number, since it is smaller than the sum of its proper divisors (28973820).

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

20835996 is a wasteful number, since it uses less digits than its factorization.

20835996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 20835996 is about 4564.6463170765. The cubic root of 20835996 is about 275.1723261507.

The spelling of 20835996 in words is "twenty million, eight hundred thirty-five thousand, nine hundred ninety-six".