21076235340 has 24 divisors (see below), whose sum is σ = 59013459120. Its totient is φ = 5620329408.

The previous prime is 21076235321. The next prime is 21076235347. The reversal of 21076235340 is 4353267012.

It is a super-2 number, since 2×21076235340² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21076235347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175635235 + ... + 175635354.

It is an arithmetic number, because the mean of its divisors is an integer number (2458894130).

Almost surely, 2^21076235340 is an apocalyptic number.

21076235340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21076235340 is an abundant number, since it is smaller than the sum of its proper divisors (37937223780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21076235340 is a wasteful number, since it uses less digits than its factorization.

21076235340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351270601 (or 351270599 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The spelling of 21076235340 in words is "twenty-one billion, seventy-six million, two hundred thirty-five thousand, three hundred forty".