21826706154 has 32 divisors (see below), whose sum is σ = 47632596480. Its totient is φ = 6612668400.

The previous prime is 21826706119. The next prime is 21826706179. The reversal of 21826706154 is 45160762812.

It is a happy number.

It is a super-2 number, since 2×21826706154² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279349 + ... + 348839.

It is an arithmetic number, because the mean of its divisors is an integer number (1488518640).

Almost surely, 2^21826706154 is an apocalyptic number.

21826706154 is an abundant number, since it is smaller than the sum of its proper divisors (25805890326).

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

21826706154 is a wasteful number, since it uses less digits than its factorization.

21826706154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74266.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 21826706154 in words is "twenty-one billion, eight hundred twenty-six million, seven hundred six thousand, one hundred fifty-four".