20013724 has 24 divisors (see below), whose sum is σ = 36528128. Its totient is φ = 9583920.

The previous prime is 20013689. The next prime is 20013731. The reversal of 20013724 is 42731002.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 11989 + ... + 13555.

Almost surely, 2^20013724 is an apocalyptic number.

It is an amenable number.

20013724 is a deficient number, since it is larger than the sum of its proper divisors (16514404).

20013724 is a wasteful number, since it uses less digits than its factorization.

20013724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705 (or 1703 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 20013724 is about 4473.6700817114. The cubic root of 20013724 is about 271.5038352423.

Adding to 20013724 its reverse (42731002), we get a palindrome (62744726).

It can be divided in two parts, 200 and 13724, that added together give a square (13924 = 118²).

The spelling of 20013724 in words is "twenty million, thirteen thousand, seven hundred twenty-four".