21041508810 has 32 divisors (see below), whose sum is σ = 57713853312. Its totient is φ = 4809487680.

The previous prime is 21041508797. The next prime is 21041508823. The reversal of 21041508810 is 1880514012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21041508797) and next prime (21041508823).

It is a super-2 number, since 2×21041508810² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50098621 + ... + 50099040.

It is an arithmetic number, because the mean of its divisors is an integer number (1803557916).

Almost surely, 2^21041508810 is an apocalyptic number.

21041508810 is an abundant number, since it is smaller than the sum of its proper divisors (36672344502).

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

21041508810 is a wasteful number, since it uses less digits than its factorization.

21041508810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100197678.

The product of its (nonzero) digits is 2560, while the sum is 30.

The spelling of 21041508810 in words is "twenty-one billion, forty-one million, five hundred eight thousand, eight hundred ten".