21011363404 has 12 divisors (see below), whose sum is σ = 36771226128. Its totient is φ = 10505298800.

The previous prime is 21011363381. The next prime is 21011363411. The reversal of 21011363404 is 40436311012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53634 + ... + 211894.

It is an arithmetic number, because the mean of its divisors is an integer number (3064268844).

Almost surely, 2^21011363404 is an apocalyptic number.

It is an amenable number.

21011363404 is a deficient number, since it is larger than the sum of its proper divisors (15759862724).

21011363404 is a wasteful number, since it uses less digits than its factorization.

21011363404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191456 (or 191454 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21011363404 its reverse (40436311012), we get a palindrome (61447674416).

The spelling of 21011363404 in words is "twenty-one billion, eleven million, three hundred sixty-three thousand, four hundred four".