21301412154 has 64 divisors (see below), whose sum is σ = 48842196480. Its totient is φ = 6134425920.

The previous prime is 21301412149. The next prime is 21301412159. The reversal of 21301412154 is 45121410312.

It is an interprime number because it is at equal distance from previous prime (21301412149) and next prime (21301412159).

It is not an unprimeable number, because it can be changed into a prime (21301412159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3577 + ... + 206435.

It is an arithmetic number, because the mean of its divisors is an integer number (763159320).

Almost surely, 2^21301412154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21301412154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24421098240).

21301412154 is an abundant number, since it is smaller than the sum of its proper divisors (27540784326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21301412154 is a wasteful number, since it uses less digits than its factorization.

21301412154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202955.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21301412154 its reverse (45121410312), we get a palindrome (66422822466).

The spelling of 21301412154 in words is "twenty-one billion, three hundred one million, four hundred twelve thousand, one hundred fifty-four".