21652544050263 has 36 divisors (see below), whose sum is σ = 36382834994688. Its totient is φ = 12372654752640.

The previous prime is 21652544050259. The next prime is 21652544050273. The reversal of 21652544050263 is 36205044525612.

21652544050263 is a `hidden beast` number, since 2 + 1 + 6 + 52 + 54 + 40 + 502 + 6 + 3 = 666.

It is not a de Polignac number, because 21652544050263 - 2² = 21652544050259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21652544050273) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25204495 + ... + 26049407.

It is an arithmetic number, because the mean of its divisors is an integer number (1010634305408).

Almost surely, 2^{21652544050263} is an apocalyptic number.

21652544050263 is a deficient number, since it is larger than the sum of its proper divisors (14730290944425).

21652544050263 is a wasteful number, since it uses less digits than its factorization.

21652544050263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903044 (or 903034 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

Adding to 21652544050263 its reverse (36205044525612), we get a palindrome (57857588575875).

The spelling of 21652544050263 in words is "twenty-one trillion, six hundred fifty-two billion, five hundred forty-four million, fifty thousand, two hundred sixty-three".