20401515224 has 64 divisors (see below), whose sum is σ = 39392040960. Its totient is φ = 9901025280.

The previous prime is 20401515191. The next prime is 20401515263. The reversal of 20401515224 is 42251510402.

It is a junction number, because it is equal to n+sod(n) for n = 20401515193 and 20401515202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35357624 + ... + 35358200.

It is an arithmetic number, because the mean of its divisors is an integer number (615500640).

Almost surely, 2^20401515224 is an apocalyptic number.

It is an amenable number.

20401515224 is a deficient number, since it is larger than the sum of its proper divisors (18990525736).

20401515224 is a wasteful number, since it uses less digits than its factorization.

20401515224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 20401515224 in words is "twenty billion, four hundred one million, five hundred fifteen thousand, two hundred twenty-four".