21313050453554 has 16 divisors (see below), whose sum is σ = 32167519935360. Its totient is φ = 10590551174160.

The previous prime is 21313050453551. The next prime is 21313050453671. The reversal of 21313050453554 is 45535405031312.

It is a super-2 number, since 2×21313050453554² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21313050453551) 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, 3983084 + ... + 7647944.

It is an arithmetic number, because the mean of its divisors is an integer number (2010469995960).

Almost surely, 2^{21313050453554} is an apocalyptic number.

21313050453554 is a deficient number, since it is larger than the sum of its proper divisors (10854469481806).

21313050453554 is a wasteful number, since it uses less digits than its factorization.

21313050453554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682865.

The product of its (nonzero) digits is 540000, while the sum is 41.

Adding to 21313050453554 its reverse (45535405031312), we get a palindrome (66848455484866).

The spelling of 21313050453554 in words is "twenty-one trillion, three hundred thirteen billion, fifty million, four hundred fifty-three thousand, five hundred fifty-four".