21357142041 has 32 divisors (see below), whose sum is σ = 30552802560. Its totient is φ = 13223153664.

The previous prime is 21357142013. The next prime is 21357142049. The reversal of 21357142041 is 14024175312.

It is not a de Polignac number, because 21357142041 - 2¹³ = 21357133849 is a prime.

It is a super-2 number, since 2×21357142041² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21357142049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1311636 + ... + 1327818.

It is an arithmetic number, because the mean of its divisors is an integer number (954775080).

Almost surely, 2^21357142041 is an apocalyptic number.

It is an amenable number.

21357142041 is a deficient number, since it is larger than the sum of its proper divisors (9195660519).

21357142041 is a wasteful number, since it uses less digits than its factorization.

21357142041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16545.

The product of its (nonzero) digits is 6720, while the sum is 30.

The spelling of 21357142041 in words is "twenty-one billion, three hundred fifty-seven million, one hundred forty-two thousand, forty-one".