21146554034 has 4 divisors (see below), whose sum is σ = 31719831054. Its totient is φ = 10573277016.

The previous prime is 21146554027. The next prime is 21146554043. The reversal of 21146554034 is 43045564112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20449858009 + 696696025 = 143003^2 + 26395^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21146553985 and 21146554003.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5286638507 + ... + 5286638510.

Almost surely, 2^21146554034 is an apocalyptic number.

21146554034 is a deficient number, since it is larger than the sum of its proper divisors (10573277020).

21146554034 is a wasteful number, since it uses less digits than its factorization.

21146554034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10573277019.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 21146554034 in words is "twenty-one billion, one hundred forty-six million, five hundred fifty-four thousand, thirty-four".