21040414254 has 32 divisors (see below), whose sum is σ = 48368772000. Its totient is φ = 6771627072.

The previous prime is 21040414253. The next prime is 21040414303. The reversal of 21040414254 is 45241404012.

21040414254 is a `hidden beast` number, since 2 + 1 + 0 + 404 + 1 + 4 + 254 = 666.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21040414253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6716319 + ... + 6719450.

It is an arithmetic number, because the mean of its divisors is an integer number (1511524125).

Almost surely, 2^21040414254 is an apocalyptic number.

21040414254 is an abundant number, since it is smaller than the sum of its proper divisors (27328357746).

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

21040414254 is a wasteful number, since it uses less digits than its factorization.

21040414254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13435809 (or 13435803 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 21040414254 its reverse (45241404012), we get a palindrome (66281818266).

The spelling of 21040414254 in words is "twenty-one billion, forty million, four hundred fourteen thousand, two hundred fifty-four".