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20910414 = 237497867
BaseRepresentation
bin100111111000…
…1000101001110
31110100100200210
41033301011032
520323113124
62024103250
7342510210
oct117610516
943310623
1020910414
1110892338
127004b26
134441935
142ac45b0
151c80a29
hex13f114e

20910414 has 16 divisors (see below), whose sum is σ = 47795328. Its totient is φ = 5974392.

The previous prime is 20910413. The next prime is 20910433. The reversal of 20910414 is 41401902.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20910413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248892 + ... + 248975.

It is an arithmetic number, because the mean of its divisors is an integer number (2987208).

Almost surely, 220910414 is an apocalyptic number.

20910414 is an abundant number, since it is smaller than the sum of its proper divisors (26884914).

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

20910414 is a wasteful number, since it uses less digits than its factorization.

20910414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497879.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20910414 is about 4572.7906140561. The cubic root of 20910414 is about 275.4995394166.

The spelling of 20910414 in words is "twenty million, nine hundred ten thousand, four hundred fourteen".

Divisors: 1 2 3 6 7 14 21 42 497867 995734 1493601 2987202 3485069 6970138 10455207 20910414