21214036430154 has 96 divisors (see below), whose sum is σ = 48742578144000. Its totient is φ = 6649379569152.

The previous prime is 21214036430123. The next prime is 21214036430183. The reversal of 21214036430154 is 45103463041212.

21214036430154 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 4 + 0 + 3 + 643 + 0 + 1 + 5 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 408494062 + ... + 408545990.

It is an arithmetic number, because the mean of its divisors is an integer number (507735189000).

Almost surely, 2^{21214036430154} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21214036430154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24371289072000).

21214036430154 is an abundant number, since it is smaller than the sum of its proper divisors (27528541713846).

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

21214036430154 is a wasteful number, since it uses less digits than its factorization.

21214036430154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60812 (or 60809 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 21214036430154 its reverse (45103463041212), we get a palindrome (66317499471366).

The spelling of 21214036430154 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, four hundred thirty thousand, one hundred fifty-four".