20153764 has 6 divisors (see below), whose sum is σ = 35269094. Its totient is φ = 10076880.

The previous prime is 20153761. The next prime is 20153803. The reversal of 20153764 is 46735102.

It can be written as a sum of positive squares in only one way, i.e., 16467364 + 3686400 = 4058^2 + 1920^2 .

It is not an unprimeable number, because it can be changed into a prime (20153761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2519217 + ... + 2519224.

Almost surely, 2^20153764 is an apocalyptic number.

It is an amenable number.

20153764 is a deficient number, since it is larger than the sum of its proper divisors (15115330).

20153764 is a wasteful number, since it uses less digits than its factorization.

20153764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5038445 (or 5038443 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20153764 is about 4489.2943766254. The cubic root of 20153764 is about 272.1356193643.

Adding to 20153764 its reverse (46735102), we get a palindrome (66888866).

It can be divided in two parts, 201537 and 64, that added together give a square (201601 = 449²).

The spelling of 20153764 in words is "twenty million, one hundred fifty-three thousand, seven hundred sixty-four".