20635436 has 12 divisors (see below), whose sum is σ = 36144360. Its totient is φ = 10308480.

The previous prime is 20635409. The next prime is 20635441. The reversal of 20635436 is 63453602.

It is a junction number, because it is equal to n+sod(n) for n = 20635399 and 20635408.

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, 6191 + ... + 8921.

It is an arithmetic number, because the mean of its divisors is an integer number (3012030).

Almost surely, 2^20635436 is an apocalyptic number.

It is an amenable number.

20635436 is a deficient number, since it is larger than the sum of its proper divisors (15508924).

20635436 is a wasteful number, since it uses less digits than its factorization.

20635436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4624 (or 4622 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 20635436 is about 4542.6243516276. The cubic root of 20635436 is about 274.2865739164.

The spelling of 20635436 in words is "twenty million, six hundred thirty-five thousand, four hundred thirty-six".