20551364 has 12 divisors (see below), whose sum is σ = 35996688. Its totient is φ = 10266600.

The previous prime is 20551303. The next prime is 20551367. The reversal of 20551364 is 46315502.

It is not an unprimeable number, because it can be changed into a prime (20551367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7319 + ... + 9729.

It is an arithmetic number, because the mean of its divisors is an integer number (2999724).

Almost surely, 2^20551364 is an apocalyptic number.

It is an amenable number.

20551364 is a deficient number, since it is larger than the sum of its proper divisors (15445324).

20551364 is a wasteful number, since it uses less digits than its factorization.

20551364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546 (or 4544 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20551364 is about 4533.3612254044. The cubic root of 20551364 is about 273.9135714049.

Adding to 20551364 its reverse (46315502), we get a palindrome (66866866).

The spelling of 20551364 in words is "twenty million, five hundred fifty-one thousand, three hundred sixty-four".