20536735 has 4 divisors (see below), whose sum is σ = 24644088. Its totient is φ = 16429384.

The previous prime is 20536729. The next prime is 20536751. The reversal of 20536735 is 53763502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20536735 - 2¹⁷ = 20405663 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20536697 and 20536706.

It is a congruent number.

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, 2053669 + ... + 2053678.

It is an arithmetic number, because the mean of its divisors is an integer number (6161022).

Almost surely, 2^20536735 is an apocalyptic number.

20536735 is a deficient number, since it is larger than the sum of its proper divisors (4107353).

20536735 is an equidigital number, since it uses as much as digits as its factorization.

20536735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4107352.

The product of its (nonzero) digits is 18900, while the sum is 31.

The square root of 20536735 is about 4531.7474554525. The cubic root of 20536735 is about 273.8485630224.

The spelling of 20536735 in words is "twenty million, five hundred thirty-six thousand, seven hundred thirty-five".