20771496 has 24 divisors (see below), whose sum is σ = 56256330. Its totient is φ = 6923808.

The previous prime is 20771489. The next prime is 20771521. The reversal of 20771496 is 69417702.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18610596 + 2160900 = 4314^2 + 1470^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20771496.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 144175 + ... + 144318.

Almost surely, 2^20771496 is an apocalyptic number.

It is an amenable number.

20771496 is an abundant number, since it is smaller than the sum of its proper divisors (35484834).

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

20771496 is a wasteful number, since it uses less digits than its factorization.

20771496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288505 (or 288498 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 20771496 is about 4557.5756713411. The cubic root of 20771496 is about 274.8880911049. Note that the first 3 decimals are identical.

The spelling of 20771496 in words is "twenty million, seven hundred seventy-one thousand, four hundred ninety-six".