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21152044 = 2231433967
BaseRepresentation
bin101000010110…
…0000100101100
31110210122011001
41100230010230
520403331134
62033210044
7344534524
oct120540454
943718131
1021152044
1110a37931
127100924
1344c7904
142b48684
151ccc414
hex142c12c

21152044 has 24 divisors (see below), whose sum is σ = 39108608. Its totient is φ = 9994320.

The previous prime is 21152039. The next prime is 21152051. The reversal of 21152044 is 44025112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3349 + ... + 7315.

Almost surely, 221152044 is an apocalyptic number.

It is an amenable number.

21152044 is a deficient number, since it is larger than the sum of its proper divisors (17956564).

21152044 is a wasteful number, since it uses less digits than its factorization.

21152044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045 (or 4043 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 21152044 is about 4599.1351360881. The cubic root of 21152044 is about 276.5566550245.

Adding to 21152044 its reverse (44025112), we get a palindrome (65177156).

The spelling of 21152044 in words is "twenty-one million, one hundred fifty-two thousand, forty-four".

Divisors: 1 2 4 31 43 62 86 124 172 1333 2666 3967 5332 7934 15868 122977 170581 245954 341162 491908 682324 5288011 10576022 21152044