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20493437 = 232573467
BaseRepresentation
bin100111000101…
…1010001111101
31102120011201012
41032023101331
520221242222
62011125005
7336122426
oct116132175
942504635
1020493437
1110628028
126a43765
134326bc3
142a1664d
151bec1e2
hex138b47d

20493437 has 8 divisors (see below), whose sum is σ = 21473856. Its totient is φ = 19520512.

The previous prime is 20493433. The next prime is 20493443. The reversal of 20493437 is 73439402.

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 20493437 - 22 = 20493433 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 (20493433) 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, 4178 + ... + 7644.

It is an arithmetic number, because the mean of its divisors is an integer number (2684232).

Almost surely, 220493437 is an apocalyptic number.

It is an amenable number.

20493437 is a deficient number, since it is larger than the sum of its proper divisors (980419).

20493437 is a wasteful number, since it uses less digits than its factorization.

20493437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3747.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 20493437 is about 4526.9677489463. The cubic root of 20493437 is about 273.6559741858.

The spelling of 20493437 in words is "twenty million, four hundred ninety-three thousand, four hundred thirty-seven".

Divisors: 1 23 257 3467 5911 79741 891019 20493437