21263060454 has 32 divisors (see below), whose sum is σ = 46074821760. Its totient is φ = 6515628672.

The previous prime is 21263060443. The next prime is 21263060491. The reversal of 21263060454 is 45406036212.

It is a super-2 number, since 2×21263060454² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2419584 + ... + 2428355.

It is an arithmetic number, because the mean of its divisors is an integer number (1439838180).

Almost surely, 2^21263060454 is an apocalyptic number.

21263060454 is an abundant number, since it is smaller than the sum of its proper divisors (24811761306).

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

21263060454 is a wasteful number, since it uses less digits than its factorization.

21263060454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4848004.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 21263060454 its reverse (45406036212), we get a palindrome (66669096666).

The spelling of 21263060454 in words is "twenty-one billion, two hundred sixty-three million, sixty thousand, four hundred fifty-four".