21022002153 has 24 divisors (see below), whose sum is σ = 31208287968. Its totient is φ = 13628385792.

The previous prime is 21022002149. The next prime is 21022002181. The reversal of 21022002153 is 35120022012.

It is not a de Polignac number, because 21022002153 - 2² = 21022002149 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21022002143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31800 + ... + 207497.

It is an arithmetic number, because the mean of its divisors is an integer number (1300345332).

Almost surely, 2^21022002153 is an apocalyptic number.

It is an amenable number.

21022002153 is a deficient number, since it is larger than the sum of its proper divisors (10186285815).

21022002153 is a wasteful number, since it uses less digits than its factorization.

21022002153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239573 (or 239570 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 21022002153 its reverse (35120022012), we get a palindrome (56142024165).

The spelling of 21022002153 in words is "twenty-one billion, twenty-two million, two thousand, one hundred fifty-three".