21773490053 has 16 divisors (see below), whose sum is σ = 25553377920. Its totient is φ = 18163180800.

The previous prime is 21773490049. The next prime is 21773490073. The reversal of 21773490053 is 35009437712.

It is a cyclic number.

It is not a de Polignac number, because 21773490053 - 2² = 21773490049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21773490043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24638 + ... + 210128.

It is an arithmetic number, because the mean of its divisors is an integer number (1597086120).

Almost surely, 2^21773490053 is an apocalyptic number.

It is an amenable number.

21773490053 is a deficient number, since it is larger than the sum of its proper divisors (3779887867).

21773490053 is a wasteful number, since it uses less digits than its factorization.

21773490053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185948.

The product of its (nonzero) digits is 158760, while the sum is 41.

The spelling of 21773490053 in words is "twenty-one billion, seven hundred seventy-three million, four hundred ninety thousand, fifty-three".