20606555143 has 8 divisors (see below), whose sum is σ = 21318897600. Its totient is φ = 19894330848.

The previous prime is 20606555129. The next prime is 20606555147. The reversal of 20606555143 is 34155560602.

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 20606555143 - 2²⁹ = 20069684231 is a prime.

It is a super-2 number, since 2×20606555143² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20606555147) 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, 466930 + ... + 509152.

It is an arithmetic number, because the mean of its divisors is an integer number (2664862200).

Almost surely, 2^20606555143 is an apocalyptic number.

20606555143 is a deficient number, since it is larger than the sum of its proper divisors (712342457).

20606555143 is a wasteful number, since it uses less digits than its factorization.

20606555143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59081.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 20606555143 in words is "twenty billion, six hundred six million, five hundred fifty-five thousand, one hundred forty-three".