21078850734045 has 64 divisors (see below), whose sum is σ = 40357274630400. Its totient is φ = 10376975819520.

The previous prime is 21078850734041. The next prime is 21078850734049. The reversal of 21078850734045 is 54043705887012.

21078850734045 is a `hidden beast` number, since 2 + 10 + 7 + 88 + 507 + 3 + 4 + 0 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (21078850734041) and next prime (21078850734049).

It is not a de Polignac number, because 21078850734045 - 2² = 21078850734041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21078850733982 and 21078850734000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21078850734041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66917215 + ... + 67231475.

It is an arithmetic number, because the mean of its divisors is an integer number (630582416100).

Almost surely, 2^{21078850734045} is an apocalyptic number.

It is an amenable number.

21078850734045 is a deficient number, since it is larger than the sum of its proper divisors (19278423896355).

21078850734045 is a wasteful number, since it uses less digits than its factorization.

21078850734045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352507 (or 352501 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 54.

The spelling of 21078850734045 in words is "twenty-one trillion, seventy-eight billion, eight hundred fifty million, seven hundred thirty-four thousand, forty-five".