21126342132 has 48 divisors (see below), whose sum is σ = 62596571520. Its totient is φ = 6036097536.

The previous prime is 21126342073. The next prime is 21126342197. The reversal of 21126342132 is 23124362112.

21126342132 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 634 + 21 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21126342096 and 21126342105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13971693 + ... + 13973204.

It is an arithmetic number, because the mean of its divisors is an integer number (1304095240).

Almost surely, 2^21126342132 is an apocalyptic number.

It is an amenable number.

21126342132 is an abundant number, since it is smaller than the sum of its proper divisors (41470229388).

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

21126342132 is a wasteful number, since it uses less digits than its factorization.

21126342132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27944917 (or 27944909 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The spelling of 21126342132 in words is "twenty-one billion, one hundred twenty-six million, three hundred forty-two thousand, one hundred thirty-two".