21153462 has 24 divisors (see below), whose sum is σ = 46504248. Its totient is φ = 6409920.

The previous prime is 21153443. The next prime is 21153481. The reversal of 21153462 is 26435112.

It is an interprime number because it is at equal distance from previous prime (21153443) and next prime (21153481).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13843 + ... + 15294.

It is an arithmetic number, because the mean of its divisors is an integer number (1937677).

Almost surely, 2^21153462 is an apocalyptic number.

21153462 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21153462 is an abundant number, since it is smaller than the sum of its proper divisors (25350786).

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

21153462 is a wasteful number, since it uses less digits than its factorization.

21153462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29164 (or 29153 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 21153462 is about 4599.2892929234. The cubic root of 21153462 is about 276.5628348619.

Adding to 21153462 its reverse (26435112), we get a palindrome (47588574).

The spelling of 21153462 in words is "twenty-one million, one hundred fifty-three thousand, four hundred sixty-two".