21074854738 has 16 divisors (see below), whose sum is σ = 36150759360. Its totient is φ = 9026471376.

The previous prime is 21074854733. The next prime is 21074854771. The reversal of 21074854738 is 83745847012.

It is a junction number, because it is equal to n+sod(n) for n = 21074854691 and 21074854700.

It is not an unprimeable number, because it can be changed into a prime (21074854733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444048 + ... + 489211.

It is an arithmetic number, because the mean of its divisors is an integer number (2259422460).

Almost surely, 2^21074854738 is an apocalyptic number.

21074854738 is a deficient number, since it is larger than the sum of its proper divisors (15075904622).

21074854738 is a wasteful number, since it uses less digits than its factorization.

21074854738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934881.

The product of its (nonzero) digits is 1505280, while the sum is 49.

The spelling of 21074854738 in words is "twenty-one billion, seventy-four million, eight hundred fifty-four thousand, seven hundred thirty-eight".