20768522 has 4 divisors (see below), whose sum is σ = 31152786. Its totient is φ = 10384260.

The previous prime is 20768497. The next prime is 20768549. The reversal of 20768522 is 22586702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15437041 + 5331481 = 3929^2 + 2309^2 .

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 as a sum of consecutive naturals, namely, 5192129 + ... + 5192132.

Almost surely, 2^20768522 is an apocalyptic number.

20768522 is a deficient number, since it is larger than the sum of its proper divisors (10384264).

20768522 is a wasteful number, since it uses less digits than its factorization.

20768522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384263.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 20768522 is about 4557.2493897087. The cubic root of 20768522 is about 274.8749712635.

The spelling of 20768522 in words is "twenty million, seven hundred sixty-eight thousand, five hundred twenty-two".