20261624 has 16 divisors (see below), whose sum is σ = 38063520. Its totient is φ = 10111360.

The previous prime is 20261621. The next prime is 20261629. The reversal of 20261624 is 42616202.

It is a self number, because there is not a number n which added to its sum of digits gives 20261624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261621) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2609 + ... + 6879.

It is an arithmetic number, because the mean of its divisors is an integer number (2378970).

Almost surely, 2^20261624 is an apocalyptic number.

It is an amenable number.

20261624 is a deficient number, since it is larger than the sum of its proper divisors (17801896).

20261624 is a wasteful number, since it uses less digits than its factorization.

20261624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4870 (or 4866 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20261624 is about 4501.2913702625. The cubic root of 20261624 is about 272.6202325532.

Adding to 20261624 its reverse (42616202), we get a palindrome (62877826).

The spelling of 20261624 in words is "twenty million, two hundred sixty-one thousand, six hundred twenty-four".