20994435 has 96 divisors (see below), whose sum is σ = 46545408. Its totient is φ = 8501760.

The previous prime is 20994433. The next prime is 20994437. The reversal of 20994435 is 53449902.

20994435 is a `hidden beast` number, since 209 + 9 + 443 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (20994433) and next prime (20994437).

It is not a de Polignac number, because 20994435 - 2¹ = 20994433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20994435.

It is not an unprimeable number, because it can be changed into a prime (20994433) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 252904 + ... + 252986.

It is an arithmetic number, because the mean of its divisors is an integer number (484848).

Almost surely, 2^20994435 is an apocalyptic number.

20994435 is an abundant number, since it is smaller than the sum of its proper divisors (25550973).

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

20994435 is a wasteful number, since it uses less digits than its factorization.

20994435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 20994435 is about 4581.9684634445. The cubic root of 20994435 is about 275.8680449882.

The spelling of 20994435 in words is "twenty million, nine hundred ninety-four thousand, four hundred thirty-five".