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20211139 = 133742019
BaseRepresentation
bin100110100011…
…0010111000011
31102000211110201
41031012113003
520133224024
62001110031
7333535414
oct115062703
942024421
1020211139
1110454a23
126928317
134258570
14298180b
151b93744
hex13465c3

20211139 has 8 divisors (see below), whose sum is σ = 22354640. Its totient is φ = 18151776.

The previous prime is 20211131. The next prime is 20211157. The reversal of 20211139 is 93111202.

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 20211139 - 23 = 20211131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211131) 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, 20529 + ... + 21490.

It is an arithmetic number, because the mean of its divisors is an integer number (2794330).

Almost surely, 220211139 is an apocalyptic number.

20211139 is a deficient number, since it is larger than the sum of its proper divisors (2143501).

20211139 is a wasteful number, since it uses less digits than its factorization.

20211139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42069.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 20211139 is about 4495.6800375472. The cubic root of 20211139 is about 272.3936189417.

It can be divided in two parts, 2021 and 1139, that added together give a triangular number (3160 = T79).

The spelling of 20211139 in words is "twenty million, two hundred eleven thousand, one hundred thirty-nine".

Divisors: 1 13 37 481 42019 546247 1554703 20211139