21349035 has 16 divisors (see below), whose sum is σ = 37954080. Its totient is φ = 11386080.

The previous prime is 21349033. The next prime is 21349043. The reversal of 21349035 is 53094312.

It is not a de Polignac number, because 21349035 - 2¹ = 21349033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21349033) 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, 78936 + ... + 79205.

It is an arithmetic number, because the mean of its divisors is an integer number (2372130).

Almost surely, 2^21349035 is an apocalyptic number.

21349035 is a deficient number, since it is larger than the sum of its proper divisors (16605045).

21349035 is a wasteful number, since it uses less digits than its factorization.

21349035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158155 (or 158149 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 21349035 is about 4620.5015961473. The cubic root of 21349035 is about 277.4125363510.

The spelling of 21349035 in words is "twenty-one million, three hundred forty-nine thousand, thirty-five".