21074152 has 32 divisors (see below), whose sum is σ = 45645120. Its totient is φ = 9015040.

The previous prime is 21074147. The next prime is 21074153. The reversal of 21074152 is 25147012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (21074153) 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, 5548 + ... + 8539.

It is an arithmetic number, because the mean of its divisors is an integer number (1426410).

Almost surely, 2^21074152 is an apocalyptic number.

21074152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21074152 is an abundant number, since it is smaller than the sum of its proper divisors (24570968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21074152 is a wasteful number, since it uses less digits than its factorization.

21074152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14121 (or 14117 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 21074152 is about 4590.6592119215. The cubic root of 21074152 is about 276.2167659289.

The spelling of 21074152 in words is "twenty-one million, seventy-four thousand, one hundred fifty-two".