20531763 has 12 divisors (see below), whose sum is σ = 33893808. Its totient is φ = 11732400.

The previous prime is 20531747. The next prime is 20531783. The reversal of 20531763 is 36713502.

It is a happy number.

It is not a de Polignac number, because 20531763 - 2⁴ = 20531747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162888 + ... + 163013.

It is an arithmetic number, because the mean of its divisors is an integer number (2824484).

Almost surely, 2^20531763 is an apocalyptic number.

20531763 is a deficient number, since it is larger than the sum of its proper divisors (13362045).

20531763 is a wasteful number, since it uses less digits than its factorization.

20531763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325914 (or 325911 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 20531763 is about 4531.1988479871. The cubic root of 20531763 is about 273.8264614087.

The spelling of 20531763 in words is "twenty million, five hundred thirty-one thousand, seven hundred sixty-three".