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20661266476 = 2227671866757
BaseRepresentation
bin10011001111100000…
…011110100000101100
31222022220211002022201
4103033200132200230
5314303241011401
613254110351244
71331001603334
oct231740364054
958286732281
1020661266476
118842823344
1240074bb524
131c436a4a86
14100005a0c4
1580dd3bb01
hex4cf81e82c

20661266476 has 12 divisors (see below), whose sum is σ = 36170303008. Its totient is φ = 10326894192.

The previous prime is 20661266473. The next prime is 20661266513. The reversal of 20661266476 is 67466216602.

It is not an unprimeable number, because it can be changed into a prime (20661266471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922311 + ... + 944446.

Almost surely, 220661266476 is an apocalyptic number.

It is an amenable number.

20661266476 is a deficient number, since it is larger than the sum of its proper divisors (15509036532).

20661266476 is a wasteful number, since it uses less digits than its factorization.

20661266476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869528 (or 1869526 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 20661266476 in words is "twenty billion, six hundred sixty-one million, two hundred sixty-six thousand, four hundred seventy-six".

Divisors: 1 2 4 2767 5534 11068 1866757 3733514 7467028 5165316619 10330633238 20661266476