21034505404 has 24 divisors (see below), whose sum is σ = 40309492608. Its totient is φ = 9524779440.

The previous prime is 21034505341. The next prime is 21034505411. The reversal of 21034505404 is 40450543012.

It is a congruent number.

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, 897282 + ... + 920425.

It is an arithmetic number, because the mean of its divisors is an integer number (1679562192).

Almost surely, 2^21034505404 is an apocalyptic number.

It is an amenable number.

21034505404 is a deficient number, since it is larger than the sum of its proper divisors (19274987204).

21034505404 is a wasteful number, since it uses less digits than its factorization.

21034505404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817985 (or 1817983 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 21034505404 in words is "twenty-one billion, thirty-four million, five hundred five thousand, four hundred four".