21541263080 has 32 divisors (see below), whose sum is σ = 48486781440. Its totient is φ = 8613138240.

The previous prime is 21541263077. The next prime is 21541263083. The reversal of 21541263080 is 8036214512.

It is an interprime number because it is at equal distance from previous prime (21541263077) and next prime (21541263083).

It is not an unprimeable number, because it can be changed into a prime (21541263083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284 + ... + 207563.

It is an arithmetic number, because the mean of its divisors is an integer number (1515211920).

Almost surely, 2^21541263080 is an apocalyptic number.

21541263080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21541263080 is an abundant number, since it is smaller than the sum of its proper divisors (26945518360).

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

21541263080 is a wasteful number, since it uses less digits than its factorization.

21541263080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210449 (or 210445 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 21541263080 its reverse (8036214512), we get a palindrome (29577477592).

The spelling of 21541263080 in words is "twenty-one billion, five hundred forty-one million, two hundred sixty-three thousand, eighty".