87921335010 has 32 divisors (see below), whose sum is σ = 212529280320. Its totient is φ = 23277014208.

The previous prime is 87921335009. The next prime is 87921335011. The reversal of 87921335010 is 1053312978.

It is an interprime number because it is at equal distance from previous prime (87921335009) and next prime (87921335011).

It is a super-2 number, since 2×87921335010² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87921335010.

It is not an unprimeable number, because it can be changed into a prime (87921335011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10537957 + ... + 10546296.

It is an arithmetic number, because the mean of its divisors is an integer number (6641540010).

Almost surely, 2^87921335010 is an apocalyptic number.

87921335010 is an abundant number, since it is smaller than the sum of its proper divisors (124607945310).

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

87921335010 is a wasteful number, since it uses less digits than its factorization.

87921335010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21084402.

The product of its (nonzero) digits is 45360, while the sum is 39.

Adding to 87921335010 its reverse (1053312978), we get a palindrome (88974647988).

The spelling of 87921335010 in words is "eighty-seven billion, nine hundred twenty-one million, three hundred thirty-five thousand, ten".