21424614154 has 16 divisors (see below), whose sum is σ = 32362575336. Its totient is φ = 10637265600.

The previous prime is 21424614151. The next prime is 21424614179. The reversal of 21424614154 is 45141642412.

It can be written as a sum of positive squares in 4 ways, for example, as 20190989025 + 1233625129 = 142095^2 + 35123^2 .

It is not an unprimeable number, because it can be changed into a prime (21424614151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201364 + ... + 288784.

Almost surely, 2^21424614154 is an apocalyptic number.

21424614154 is a deficient number, since it is larger than the sum of its proper divisors (10937961182).

21424614154 is a wasteful number, since it uses less digits than its factorization.

21424614154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88281.

The product of its digits is 30720, while the sum is 34.

The spelling of 21424614154 in words is "twenty-one billion, four hundred twenty-four million, six hundred fourteen thousand, one hundred fifty-four".