21510151204034 has 16 divisors (see below), whose sum is σ = 34279779228408. Its totient is φ = 10087876568832.

The previous prime is 21510151204033. The next prime is 21510151204037. The reversal of 21510151204034 is 43040215101512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20817802398409 + 692348805625 = 4562653^2 + 832075^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21510151203988 and 21510151204006.

It is not an unprimeable number, because it can be changed into a prime (21510151204033) 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, 1079600117 + ... + 1079620040.

Almost surely, 2^{21510151204034} is an apocalyptic number.

21510151204034 is a deficient number, since it is larger than the sum of its proper divisors (12769628024374).

21510151204034 is a wasteful number, since it uses less digits than its factorization.

21510151204034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159220469.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 21510151204034 its reverse (43040215101512), we get a palindrome (64550366305546).

The spelling of 21510151204034 in words is "twenty-one trillion, five hundred ten billion, one hundred fifty-one million, two hundred four thousand, thirty-four".