21452935 has 20 divisors (see below), whose sum is σ = 30049128. Its totient is φ = 14702352.

The previous prime is 21452923. The next prime is 21452939. The reversal of 21452935 is 53925412.

It is not a de Polignac number, because 21452935 - 2⁵ = 21452903 is a prime.

It is a super-2 number, since 2×21452935² = 920456840228450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21452897 and 21452906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452939) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11112 + ... + 12898.

Almost surely, 2^21452935 is an apocalyptic number.

21452935 is a deficient number, since it is larger than the sum of its proper divisors (8596193).

21452935 is an frugal number, since it uses more digits than its factorization.

21452935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820 (or 1799 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 21452935 is about 4631.7313177688. The cubic root of 21452935 is about 277.8618389440.

The spelling of 21452935 in words is "twenty-one million, four hundred fifty-two thousand, nine hundred thirty-five".