21401050154 has 16 divisors (see below), whose sum is σ = 35105538240. Its totient is φ = 9703961760.

The previous prime is 21401050133. The next prime is 21401050199. The reversal of 21401050154 is 45105010412.

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, 1180214 + ... + 1198209.

It is an arithmetic number, because the mean of its divisors is an integer number (2194096140).

Almost surely, 2^21401050154 is an apocalyptic number.

21401050154 is a deficient number, since it is larger than the sum of its proper divisors (13704488086).

21401050154 is a wasteful number, since it uses less digits than its factorization.

21401050154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378845.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 21401050154 its reverse (45105010412), we get a palindrome (66506060566).

The spelling of 21401050154 in words is "twenty-one billion, four hundred one million, fifty thousand, one hundred fifty-four".