20212401553 has 4 divisors (see below), whose sum is σ = 20212788708. Its totient is φ = 20212014400.

The previous prime is 20212401529. The next prime is 20212401557. The reversal of 20212401553 is 35510421202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7431646849 + 12780754704 = 86207^2 + 113052^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212401553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212401557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100276 + ... + 224677.

It is an arithmetic number, because the mean of its divisors is an integer number (5053197177).

Almost surely, 2^20212401553 is an apocalyptic number.

It is an amenable number.

20212401553 is a deficient number, since it is larger than the sum of its proper divisors (387155).

20212401553 is an equidigital number, since it uses as much as digits as its factorization.

20212401553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387154.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20212401553 its reverse (35510421202), we get a palindrome (55722822755).

The spelling of 20212401553 in words is "twenty billion, two hundred twelve million, four hundred one thousand, five hundred fifty-three".