20021154324 has 48 divisors (see below), whose sum is σ = 47414156160. Its totient is φ = 6574210560.

The previous prime is 20021154253. The next prime is 20021154367. The reversal of 20021154324 is 42345112002.

It is a junction number, because it is equal to n+sod(n) for n = 20021154294 and 20021154303.

It is a congruent number.

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, 721344 + ... + 748584.

It is an arithmetic number, because the mean of its divisors is an integer number (987794920).

Almost surely, 2^20021154324 is an apocalyptic number.

It is an amenable number.

20021154324 is an abundant number, since it is smaller than the sum of its proper divisors (27393001836).

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

20021154324 is a wasteful number, since it uses less digits than its factorization.

20021154324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28160 (or 28158 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 20021154324 its reverse (42345112002), we get a palindrome (62366266326).

It can be divided in two parts, 20021 and 154324, that added together give a triangular number (174345 = T₅₉₀).

The spelling of 20021154324 in words is "twenty billion, twenty-one million, one hundred fifty-four thousand, three hundred twenty-four".