20751093 has 32 divisors (see below), whose sum is σ = 33897600. Its totient is φ = 12441600.

The previous prime is 20751089. The next prime is 20751103. The reversal of 20751093 is 39015702.

It is not a de Polignac number, because 20751093 - 2² = 20751089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20751023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32053 + ... + 32693.

It is an arithmetic number, because the mean of its divisors is an integer number (1059300).

Almost surely, 2^20751093 is an apocalyptic number.

It is an amenable number.

20751093 is a deficient number, since it is larger than the sum of its proper divisors (13146507).

20751093 is a wasteful number, since it uses less digits than its factorization.

20751093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 20751093 is about 4555.3367603285. The cubic root of 20751093 is about 274.7980578036.

Adding to 20751093 its reverse (39015702), we get a palindrome (59766795).

The spelling of 20751093 in words is "twenty million, seven hundred fifty-one thousand, ninety-three".