20536254 has 40 divisors (see below), whose sum is σ = 46478520. Its totient is φ = 6776784.

The previous prime is 20536231. The next prime is 20536279. The reversal of 20536254 is 45263502.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17077 + ... + 18239.

It is an arithmetic number, because the mean of its divisors is an integer number (1161963).

Almost surely, 2^20536254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20536254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23239260).

20536254 is an abundant number, since it is smaller than the sum of its proper divisors (25942266).

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

20536254 is a wasteful number, since it uses less digits than its factorization.

20536254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286 (or 1277 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 20536254 is about 4531.6943851059. The cubic root of 20536254 is about 273.8464250294.

Adding to 20536254 its reverse (45263502), we get a palindrome (65799756).

The spelling of 20536254 in words is "twenty million, five hundred thirty-six thousand, two hundred fifty-four".