21363153 has 8 divisors (see below), whose sum is σ = 32553408. Its totient is φ = 12207504.

The previous prime is 21363149. The next prime is 21363161. The reversal of 21363153 is 35136312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21363153 - 2² = 21363149 is a prime.

It is a super-2 number, since 2×21363153² = 912768612202818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21363103) 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, 508626 + ... + 508667.

It is an arithmetic number, because the mean of its divisors is an integer number (4069176).

Almost surely, 2^21363153 is an apocalyptic number.

It is an amenable number.

21363153 is a deficient number, since it is larger than the sum of its proper divisors (11190255).

21363153 is a wasteful number, since it uses less digits than its factorization.

21363153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017303.

The product of its digits is 1620, while the sum is 24.

The square root of 21363153 is about 4622.0290998651. The cubic root of 21363153 is about 277.4736733404.

Adding to 21363153 its reverse (35136312), we get a palindrome (56499465).

The spelling of 21363153 in words is "twenty-one million, three hundred sixty-three thousand, one hundred fifty-three".