21450124310534 has 16 divisors (see below), whose sum is σ = 33574360723200. Its totient is φ = 10258677766920.

The previous prime is 21450124310533. The next prime is 21450124310551. The reversal of 21450124310534 is 43501342105412.

It is a junction number, because it is equal to n+sod(n) for n = 21450124310494 and 21450124310503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21450124310533) 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, 4662617 + ... + 8039915.

It is an arithmetic number, because the mean of its divisors is an integer number (2098397545200).

Almost surely, 2^{21450124310534} is an apocalyptic number.

21450124310534 is a deficient number, since it is larger than the sum of its proper divisors (12124236412666).

21450124310534 is a wasteful number, since it uses less digits than its factorization.

21450124310534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515395.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 21450124310534 its reverse (43501342105412), we get a palindrome (64951466415946).

It can be divided in two parts, 2145012 and 4310534, that added together give a palindrome (6455546).

The spelling of 21450124310534 in words is "twenty-one trillion, four hundred fifty billion, one hundred twenty-four million, three hundred ten thousand, five hundred thirty-four".