21154313002 has 16 divisors (see below), whose sum is σ = 32955880320. Its totient is φ = 10176648448.

The previous prime is 21154312969. The next prime is 21154313021. The reversal of 21154313002 is 20031345112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1901623 + ... + 1912714.

It is an arithmetic number, because the mean of its divisors is an integer number (2059742520).

Almost surely, 2^21154313002 is an apocalyptic number.

21154313002 is a deficient number, since it is larger than the sum of its proper divisors (11801567318).

21154313002 is a wasteful number, since it uses less digits than its factorization.

21154313002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3814445.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21154313002 its reverse (20031345112), we get a palindrome (41185658114).

The spelling of 21154313002 in words is "twenty-one billion, one hundred fifty-four million, three hundred thirteen thousand, two".