21435403054 has 32 divisors (see below), whose sum is σ = 36820798560. Its totient is φ = 9271299072.

The previous prime is 21435403049. The next prime is 21435403079. The reversal of 21435403054 is 45030453412.

It is a congruent number.

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, 1084 + ... + 207055.

It is an arithmetic number, because the mean of its divisors is an integer number (1150649955).

Almost surely, 2^21435403054 is an apocalyptic number.

21435403054 is a deficient number, since it is larger than the sum of its proper divisors (15385395506).

21435403054 is a wasteful number, since it uses less digits than its factorization.

21435403054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208404.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 21435403054 its reverse (45030453412), we get a palindrome (66465856466).

The spelling of 21435403054 in words is "twenty-one billion, four hundred thirty-five million, four hundred three thousand, fifty-four".