21140400000004 has 48 divisors (see below), whose sum is σ = 37598779370880. Its totient is φ = 10398649847040.

The previous prime is 21140399999993. The next prime is 21140400000017. The reversal of 21140400000004 is 40000000404112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448712409 + ... + 448759519.

It is an arithmetic number, because the mean of its divisors is an integer number (783307903560).

Almost surely, 2^{21140400000004} is an apocalyptic number.

It is an amenable number.

21140400000004 is a deficient number, since it is larger than the sum of its proper divisors (16458379370876).

21140400000004 is a wasteful number, since it uses less digits than its factorization.

21140400000004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51100 (or 51098 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21140400000004 its reverse (40000000404112), we get a palindrome (61140400404116).

The spelling of 21140400000004 in words is "twenty-one trillion, one hundred forty billion, four hundred million, four", and thus it is an aban number.