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20433493 = 196611627
BaseRepresentation
bin100110111110…
…0101001010101
31102110010111001
41031330221111
520212332433
62005543301
7335452603
oct115745125
942403431
1020433493
1110596a93
126a14b31
134305832
1429dc873
151bd957d
hex137ca55

20433493 has 8 divisors (see below), whose sum is σ = 21554720. Its totient is φ = 19316880.

The previous prime is 20433481. The next prime is 20433533. The reversal of 20433493 is 39433402.

Adding to 20433493 its reverse (39433402), we get a palindrome (59866895).

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

It is a cyclic number.

It is not a de Polignac number, because 20433493 - 29 = 20432981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20433403) 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, 11746 + ... + 13372.

It is an arithmetic number, because the mean of its divisors is an integer number (2694340).

Almost surely, 220433493 is an apocalyptic number.

It is an amenable number.

20433493 is a deficient number, since it is larger than the sum of its proper divisors (1121227).

20433493 is a wasteful number, since it uses less digits than its factorization.

20433493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 20433493 is about 4520.3421330691. The cubic root of 20433493 is about 273.3888959357.

The spelling of 20433493 in words is "twenty million, four hundred thirty-three thousand, four hundred ninety-three".

Divisors: 1 19 661 1627 12559 30913 1075447 20433493