2154729924 has 60 divisors (see below), whose sum is σ = 5687665984. Its totient is φ = 711259056.

The previous prime is 2154729917. The next prime is 2154729931. The reversal of 2154729924 is 4299274512.

It is an interprime number because it is at equal distance from previous prime (2154729917) and next prime (2154729931).

It is a super-2 number, since 2×2154729924² = 9285722090762091552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2154729924.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1089 + ... + 65655.

Almost surely, 2^2154729924 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154729924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2843832992).

2154729924 is an abundant number, since it is smaller than the sum of its proper divisors (3532936060).

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

2154729924 is a wasteful number, since it uses less digits than its factorization.

2154729924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64686 (or 64675 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 2154729924 is about 46419.0685386943. The cubic root of 2154729924 is about 1291.6086583583.

The spelling of 2154729924 in words is "two billion, one hundred fifty-four million, seven hundred twenty-nine thousand, nine hundred twenty-four".