20261924 has 6 divisors (see below), whose sum is σ = 35458374. Its totient is φ = 10130960.

The previous prime is 20261911. The next prime is 20261929. The reversal of 20261924 is 42916202.

It can be written as a sum of positive squares in only one way, i.e., 15054400 + 5207524 = 3880^2 + 2282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20261893 and 20261902.

It is not an unprimeable number, because it can be changed into a prime (20261929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2532737 + ... + 2532744.

It is an arithmetic number, because the mean of its divisors is an integer number (5909729).

Almost surely, 2^20261924 is an apocalyptic number.

It is an amenable number.

20261924 is a deficient number, since it is larger than the sum of its proper divisors (15196450).

20261924 is a wasteful number, since it uses less digits than its factorization.

20261924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065485 (or 5065483 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20261924 is about 4501.3246939096. The cubic root of 20261924 is about 272.6215780470.

It can be divided in two parts, 202 and 61924, that added together give a palindrome (62126).

The spelling of 20261924 in words is "twenty million, two hundred sixty-one thousand, nine hundred twenty-four".