21345401412 has 36 divisors (see below), whose sum is σ = 55211236080. Its totient is φ = 6949665072.

The previous prime is 21345401377. The next prime is 21345401423. The reversal of 21345401412 is 21410454312.

21345401412 is a `hidden beast` number, since 213 + 4 + 5 + 401 + 41 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×21345401412² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6892962 + ... + 6896057.

Almost surely, 2^21345401412 is an apocalyptic number.

It is an amenable number.

21345401412 is an abundant number, since it is smaller than the sum of its proper divisors (33865834668).

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

21345401412 is a wasteful number, since it uses less digits than its factorization.

21345401412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13789072 (or 13789067 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 21345401412 its reverse (21410454312), we get a palindrome (42755855724).

The spelling of 21345401412 in words is "twenty-one billion, three hundred forty-five million, four hundred one thousand, four hundred twelve".