20751012 has 48 divisors (see below), whose sum is σ = 54073600. Its totient is φ = 6881760.

The previous prime is 20751011. The next prime is 20751019. The reversal of 20751012 is 21015702.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20751011) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 28914 + ... + 29622.

Almost surely, 2^20751012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20751012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27036800).

20751012 is an abundant number, since it is smaller than the sum of its proper divisors (33322588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20751012 is a wasteful number, since it uses less digits than its factorization.

20751012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 20751012 is about 4555.3278696489. The cubic root of 20751012 is about 274.7977002534.

Adding to 20751012 its reverse (21015702), we get a palindrome (41766714).

The spelling of 20751012 in words is "twenty million, seven hundred fifty-one thousand, twelve".