21413406208460 has 48 divisors (see below), whose sum is σ = 51392444350464. Its totient is φ = 7341700778688.

The previous prime is 21413406208427. The next prime is 21413406208463. The reversal of 21413406208460 is 6480260431412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21413406208463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43509077 + ... + 43998483.

It is an arithmetic number, because the mean of its divisors is an integer number (1070675923968).

Almost surely, 2^{21413406208460} is an apocalyptic number.

21413406208460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21413406208460 is an abundant number, since it is smaller than the sum of its proper divisors (29979038142004).

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

21413406208460 is a wasteful number, since it uses less digits than its factorization.

21413406208460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801950 (or 801948 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 41.

Adding to 21413406208460 its reverse (6480260431412), we get a palindrome (27893666639872).

The spelling of 21413406208460 in words is "twenty-one trillion, four hundred thirteen billion, four hundred six million, two hundred eight thousand, four hundred sixty".