21146160031 has 4 divisors (see below), whose sum is σ = 21146467392. Its totient is φ = 21145852672.

The previous prime is 21146159989. The next prime is 21146160083. The reversal of 21146160031 is 13006164112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21146160031 - 2²¹ = 21144062879 is a prime.

It is a super-2 number, since 2×21146160031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21146159978 and 21146160005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21146160131) 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, 2271 + ... + 205663.

It is an arithmetic number, because the mean of its divisors is an integer number (5286616848).

Almost surely, 2^21146160031 is an apocalyptic number.

21146160031 is a deficient number, since it is larger than the sum of its proper divisors (307361).

21146160031 is a wasteful number, since it uses less digits than its factorization.

21146160031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307360.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 21146160031 in words is "twenty-one billion, one hundred forty-six million, one hundred sixty thousand, thirty-one".