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31820228094 = 23231583145661
BaseRepresentation
bin11101101000101000…
…100010010111111110
310001010121101001220110
4131220220202113332
51010131434244334
622341253530450
72204351322204
oct355050422776
9101117331813
1031820228094
1112549764376
126200643a26
133001518345
14177c0a9074
15c6382aae9
hex768a225fe

31820228094 has 32 divisors (see below), whose sum is σ = 66449839104. Its totient is φ = 10139101280.

The previous prime is 31820228081. The next prime is 31820228119. The reversal of 31820228094 is 49082202813.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145624 + ... + 291284.

It is an arithmetic number, because the mean of its divisors is an integer number (2076557472).

Almost surely, 231820228094 is an apocalyptic number.

31820228094 is an abundant number, since it is smaller than the sum of its proper divisors (34629611010).

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

31820228094 is a wasteful number, since it uses less digits than its factorization.

31820228094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147272.

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 31820228094 in words is "thirty-one billion, eight hundred twenty million, two hundred twenty-eight thousand, ninety-four".

Divisors: 1 2 3 6 23 46 69 138 1583 3166 4749 9498 36409 72818 109227 145661 218454 291322 436983 873966 3350203 6700406 10050609 20101218 230581363 461162726 691744089 1383488178 5303371349 10606742698 15910114047 31820228094