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21077934 = 233512989
BaseRepresentation
bin101000001100…
…1111110101110
31110122212111020
41100121332232
520343443214
62031435010
7344105463
oct120317656
943585436
1021077934
1110997189
127085a66
13449cc67
142b2966a
151cb54a9
hex1419fae

21077934 has 8 divisors (see below), whose sum is σ = 42155880. Its totient is φ = 7025976.

The previous prime is 21077929. The next prime is 21077951. The reversal of 21077934 is 43977012.

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

21077934 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21077895 and 21077904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1756489 + ... + 1756500.

It is an arithmetic number, because the mean of its divisors is an integer number (5269485).

Almost surely, 221077934 is an apocalyptic number.

21077934 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21077934 is a wasteful number, since it uses less digits than its factorization.

21077934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512994.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 21077934 is about 4591.0711168528. The cubic root of 21077934 is about 276.2332883702.

The spelling of 21077934 in words is "twenty-one million, seventy-seven thousand, nine hundred thirty-four".

Divisors: 1 2 3 6 3512989 7025978 10538967 21077934