20261336 has 32 divisors (see below), whose sum is σ = 39037440. Its totient is φ = 9855648.

The previous prime is 20261323. The next prime is 20261347. The reversal of 20261336 is 63316202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55025 + ... + 55391.

It is an arithmetic number, because the mean of its divisors is an integer number (1219920).

Almost surely, 2^20261336 is an apocalyptic number.

It is an amenable number.

20261336 is a deficient number, since it is larger than the sum of its proper divisors (18776104).

20261336 is a wasteful number, since it uses less digits than its factorization.

20261336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20261336 is about 4501.2593793293. The cubic root of 20261336 is about 272.6189408667.

Adding to 20261336 its reverse (63316202), we get a palindrome (83577538).

The spelling of 20261336 in words is "twenty million, two hundred sixty-one thousand, three hundred thirty-six".