20535534 has 12 divisors (see below), whose sum is σ = 44493696. Its totient is φ = 6845172.

The previous prime is 20535533. The next prime is 20535551. The reversal of 20535534 is 43553502.

It is a junction number, because it is equal to n+sod(n) for n = 20535498 and 20535507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 570414 + ... + 570449.

It is an arithmetic number, because the mean of its divisors is an integer number (3707808).

Almost surely, 2^20535534 is an apocalyptic number.

20535534 is an abundant number, since it is smaller than the sum of its proper divisors (23958162).

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

20535534 is a wasteful number, since it uses less digits than its factorization.

20535534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140871 (or 1140868 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 20535534 is about 4531.6149439245. The cubic root of 20535534 is about 273.8432246449.

The spelling of 20535534 in words is "twenty million, five hundred thirty-five thousand, five hundred thirty-four".