21034106510 has 32 divisors (see below), whose sum is σ = 39983569920. Its totient is φ = 7950863008.

The previous prime is 21034106501. The next prime is 21034106519. The reversal of 21034106510 is 1560143012.

It is an interprime number because it is at equal distance from previous prime (21034106501) and next prime (21034106519).

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034106519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531830 + ... + 570009.

It is an arithmetic number, because the mean of its divisors is an integer number (1249486560).

Almost surely, 2^21034106510 is an apocalyptic number.

21034106510 is a deficient number, since it is larger than the sum of its proper divisors (18949463410).

21034106510 is a wasteful number, since it uses less digits than its factorization.

21034106510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101952.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21034106510 its reverse (1560143012), we get a palindrome (22594249522).

The spelling of 21034106510 in words is "twenty-one billion, thirty-four million, one hundred six thousand, five hundred ten".