21025401514 has 16 divisors (see below), whose sum is σ = 33976938240. Its totient is φ = 9700366320.

The previous prime is 21025401487. The next prime is 21025401541. The reversal of 21025401514 is 41510452012.

It is an interprime number because it is at equal distance from previous prime (21025401487) and next prime (21025401541).

It is an unprimeable number.

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, 81934 + ... + 220825.

It is an arithmetic number, because the mean of its divisors is an integer number (2123558640).

Almost surely, 2^21025401514 is an apocalyptic number.

21025401514 is a deficient number, since it is larger than the sum of its proper divisors (12951536726).

21025401514 is a wasteful number, since it uses less digits than its factorization.

21025401514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305445.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 21025401514 its reverse (41510452012), we get a palindrome (62535853526).

The spelling of 21025401514 in words is "twenty-one billion, twenty-five million, four hundred one thousand, five hundred fourteen".