20751048 has 24 divisors (see below), whose sum is σ = 56200950. Its totient is φ = 6916992.

The previous prime is 20751047. The next prime is 20751061. The reversal of 20751048 is 84015702.

It can be written as a sum of positive squares in only one way, i.e., 20412324 + 338724 = 4518^2 + 582^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (20751047) 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 5 ways as a sum of consecutive naturals, for example, 144033 + ... + 144176.

Almost surely, 2^20751048 is an apocalyptic number.

It is an amenable number.

20751048 is an abundant number, since it is smaller than the sum of its proper divisors (35449902).

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

20751048 is a wasteful number, since it uses less digits than its factorization.

20751048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288221 (or 288214 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 20751048 is about 4555.3318210642. The cubic root of 20751048 is about 274.7978591648.

The spelling of 20751048 in words is "twenty million, seven hundred fifty-one thousand, forty-eight".