20012746 has 16 divisors (see below), whose sum is σ = 32652648. Its totient is φ = 9144000.

The previous prime is 20012743. The next prime is 20012761. The reversal of 20012746 is 64721002.

It can be written as a sum of positive squares in 4 ways, for example, as 19900521 + 112225 = 4461^2 + 335^2 .

It is not an unprimeable number, because it can be changed into a prime (20012743) 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 7 ways as a sum of consecutive naturals, for example, 1185 + ... + 6436.

Almost surely, 2^20012746 is an apocalyptic number.

20012746 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20012746 is a deficient number, since it is larger than the sum of its proper divisors (12639902).

20012746 is a wasteful number, since it uses less digits than its factorization.

20012746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7737.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20012746 is about 4473.5607741485. The cubic root of 20012746 is about 271.4994126925.

Adding to 20012746 its reverse (64721002), we get a palindrome (84733748).

The spelling of 20012746 in words is "twenty million, twelve thousand, seven hundred forty-six".