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18970301 = 747901
BaseRepresentation
bin100100001011…
…1011010111101
31022200210100202
41020113122331
514324022201
61514333245
7320150000
oct110273275
938623322
1018970301
11a787739
12642a225
133c1283c
14273b537
1519eac6b
hex12176bd

18970301 has 10 divisors (see below), whose sum is σ = 22133502. Its totient is φ = 16258200.

The previous prime is 18970297. The next prime is 18970319. The reversal of 18970301 is 10307981.

It can be written as a sum of positive squares in only one way, i.e., 17347225 + 1623076 = 4165^2 + 1274^2 .

It is not a de Polignac number, because 18970301 - 22 = 18970297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18970361) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1550 + ... + 6351.

Almost surely, 218970301 is an apocalyptic number.

It is an amenable number.

18970301 is a deficient number, since it is larger than the sum of its proper divisors (3163201).

18970301 is an frugal number, since it uses more digits than its factorization.

18970301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7929 (or 7908 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 18970301 is about 4355.4909022979. The cubic root of 18970301 is about 266.7010592794.

The spelling of 18970301 in words is "eighteen million, nine hundred seventy thousand, three hundred one".

Divisors: 1 7 49 343 2401 7901 55307 387149 2710043 18970301