21340021004 has 24 divisors (see below), whose sum is σ = 37545596928. Its totient is φ = 10612826000.

The previous prime is 21340020991. The next prime is 21340021039. The reversal of 21340021004 is 40012004312.

It is a super-2 number, since 2×21340021004² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 731669 + ... + 760275.

It is an arithmetic number, because the mean of its divisors is an integer number (1564399872).

Almost surely, 2^21340021004 is an apocalyptic number.

It is an amenable number.

21340021004 is a deficient number, since it is larger than the sum of its proper divisors (16205575924).

21340021004 is a wasteful number, since it uses less digits than its factorization.

21340021004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29605 (or 29603 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21340021004 its reverse (40012004312), we get a palindrome (61352025316).

The spelling of 21340021004 in words is "twenty-one billion, three hundred forty million, twenty-one thousand, four".