21140040325 has 12 divisors (see below), whose sum is σ = 26248953888. Its totient is φ = 16889255600.

The previous prime is 21140040247. The next prime is 21140040329. The reversal of 21140040325 is 52304004112.

It is not a de Polignac number, because 21140040325 - 2⁷ = 21140040197 is a prime.

It is a super-2 number, since 2×21140040325² (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 = 21140040296 and 21140040305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140040329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550471 + ... + 587620.

It is an arithmetic number, because the mean of its divisors is an integer number (2187412824).

Almost surely, 2^21140040325 is an apocalyptic number.

21140040325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21140040325 is a deficient number, since it is larger than the sum of its proper divisors (5108913563).

21140040325 is a wasteful number, since it uses less digits than its factorization.

21140040325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138844 (or 1138839 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21140040325 its reverse (52304004112), we get a palindrome (73444044437).

The spelling of 21140040325 in words is "twenty-one billion, one hundred forty million, forty thousand, three hundred twenty-five".