21064364131 has 8 divisors (see below), whose sum is σ = 22365577440. Its totient is φ = 19770054528.

The previous prime is 21064364081. The next prime is 21064364147. The reversal of 21064364131 is 13146346012.

It is a happy number.

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

It is not a de Polignac number, because 21064364131 - 2¹¹ = 21064362083 is a prime.

It is a super-2 number, since 2×21064364131² (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 = 21064364093 and 21064364102.

It is not an unprimeable number, because it can be changed into a prime (21064364831) 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, 1719636 + ... + 1731841.

It is an arithmetic number, because the mean of its divisors is an integer number (2795697180).

Almost surely, 2^21064364131 is an apocalyptic number.

21064364131 is a deficient number, since it is larger than the sum of its proper divisors (1301213309).

21064364131 is a wasteful number, since it uses less digits than its factorization.

21064364131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451853.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 21064364131 in words is "twenty-one billion, sixty-four million, three hundred sixty-four thousand, one hundred thirty-one".