21054444734 has 8 divisors (see below), whose sum is σ = 31584192528. Its totient is φ = 10526380560.

The previous prime is 21054444727. The next prime is 21054444751. The reversal of 21054444734 is 43744445012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 389162 + ... + 439949.

It is an arithmetic number, because the mean of its divisors is an integer number (3948024066).

Almost surely, 2^21054444734 is an apocalyptic number.

21054444734 is a deficient number, since it is larger than the sum of its proper divisors (10529747794).

21054444734 is a wasteful number, since it uses less digits than its factorization.

21054444734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841810.

The product of its (nonzero) digits is 215040, while the sum is 38.

Adding to 21054444734 its reverse (43744445012), we get a palindrome (64798889746).

The spelling of 21054444734 in words is "twenty-one billion, fifty-four million, four hundred forty-four thousand, seven hundred thirty-four".