20146551 has 8 divisors (see below), whose sum is σ = 28030080. Its totient is φ = 12847032.

The previous prime is 20146543. The next prime is 20146573. The reversal of 20146551 is 15564102.

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

It is not a de Polignac number, because 20146551 - 2³ = 20146543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20146591) 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, 145921 + ... + 146058.

It is an arithmetic number, because the mean of its divisors is an integer number (3503760).

Almost surely, 2^20146551 is an apocalyptic number.

20146551 is a deficient number, since it is larger than the sum of its proper divisors (7883529).

20146551 is a wasteful number, since it uses less digits than its factorization.

20146551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292005.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 20146551 is about 4488.4909490830. The cubic root of 20146551 is about 272.1031498556.

The spelling of 20146551 in words is "twenty million, one hundred forty-six thousand, five hundred fifty-one".