20535078 has 16 divisors (see below), whose sum is σ = 41138496. Its totient is φ = 6833640.

The previous prime is 20535061. The next prime is 20535079. The reversal of 20535078 is 87053502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1593 + ... + 6603.

It is an arithmetic number, because the mean of its divisors is an integer number (2571156).

Almost surely, 2^20535078 is an apocalyptic number.

20535078 is an abundant number, since it is smaller than the sum of its proper divisors (20603418).

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

20535078 is a wasteful number, since it uses less digits than its factorization.

20535078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5699.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 20535078 is about 4531.5646304560. The cubic root of 20535078 is about 273.8411976960.

The spelling of 20535078 in words is "twenty million, five hundred thirty-five thousand, seventy-eight".