21913035 has 16 divisors (see below), whose sum is σ = 35126304. Its totient is φ = 11665152.

The previous prime is 21912977. The next prime is 21913037. The reversal of 21913035 is 53031912.

It is a happy number.

It is not a de Polignac number, because 21913035 - 2⁷ = 21912907 is a prime.

It is a super-2 number, since 2×21913035² = 960362205822450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21912996 and 21913014.

It is not an unprimeable number, because it can be changed into a prime (21913037) 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, 9999 + ... + 11991.

It is an arithmetic number, because the mean of its divisors is an integer number (2195394).

Almost surely, 2^21913035 is an apocalyptic number.

21913035 is a deficient number, since it is larger than the sum of its proper divisors (13213269).

21913035 is a wasteful number, since it uses less digits than its factorization.

21913035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 21913035 is about 4681.1360800558. The cubic root of 21913035 is about 279.8342343658.

Adding to 21913035 its reverse (53031912), we get a palindrome (74944947).

The spelling of 21913035 in words is "twenty-one million, nine hundred thirteen thousand, thirty-five".