21418227132 has 12 divisors (see below), whose sum is σ = 49975863336. Its totient is φ = 7139409040.

The previous prime is 21418227091. The next prime is 21418227137. The reversal of 21418227132 is 23172281412.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21418227093 and 21418227102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21418227137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892426119 + ... + 892426142.

It is an arithmetic number, because the mean of its divisors is an integer number (4164655278).

Almost surely, 2^21418227132 is an apocalyptic number.

It is an amenable number.

21418227132 is an abundant number, since it is smaller than the sum of its proper divisors (28557636204).

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

21418227132 is a wasteful number, since it uses less digits than its factorization.

21418227132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784852268 (or 1784852266 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The spelling of 21418227132 in words is "twenty-one billion, four hundred eighteen million, two hundred twenty-seven thousand, one hundred thirty-two".