21022145877 has 8 divisors (see below), whose sum is σ = 28063671840. Its totient is φ = 13997691920.

The previous prime is 21022145839. The next prime is 21022145929. The reversal of 21022145877 is 77854122012.

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

It is a cyclic number.

It is not a de Polignac number, because 21022145877 - 2¹² = 21022141781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022145077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4265127 + ... + 4270052.

It is an arithmetic number, because the mean of its divisors is an integer number (3507958980).

Almost surely, 2^21022145877 is an apocalyptic number.

It is an amenable number.

21022145877 is a deficient number, since it is larger than the sum of its proper divisors (7041525963).

21022145877 is an equidigital number, since it uses as much as digits as its factorization.

21022145877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8536003.

The product of its (nonzero) digits is 62720, while the sum is 39.

Adding to 21022145877 its reverse (77854122012), we get a palindrome (98876267889).

The spelling of 21022145877 in words is "twenty-one billion, twenty-two million, one hundred forty-five thousand, eight hundred seventy-seven".