21460413534 has 64 divisors (see below), whose sum is σ = 51307637760. Its totient is φ = 5850915840.

The previous prime is 21460413503. The next prime is 21460413547. The reversal of 21460413534 is 43531406412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21460413495 and 21460413504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 380302 + ... + 433070.

It is an arithmetic number, because the mean of its divisors is an integer number (801681840).

Almost surely, 2^21460413534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21460413534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25653818880).

21460413534 is an abundant number, since it is smaller than the sum of its proper divisors (29847224226).

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

21460413534 is a wasteful number, since it uses less digits than its factorization.

21460413534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53225.

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

Adding to 21460413534 its reverse (43531406412), we get a palindrome (64991819946).

The spelling of 21460413534 in words is "twenty-one billion, four hundred sixty million, four hundred thirteen thousand, five hundred thirty-four".