20863903225 has 24 divisors (see below), whose sum is σ = 29883364128. Its totient is φ = 14281171200.

The previous prime is 20863903219. The next prime is 20863903237. The reversal of 20863903225 is 52230936802.

It is a happy number.

It is not a de Polignac number, because 20863903225 - 2²¹ = 20861806073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2226759 + ... + 2236108.

It is an arithmetic number, because the mean of its divisors is an integer number (1245140172).

Almost surely, 2^20863903225 is an apocalyptic number.

20863903225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20863903225 is a deficient number, since it is larger than the sum of its proper divisors (9019460903).

20863903225 is a wasteful number, since it uses less digits than its factorization.

20863903225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462905 (or 4462900 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 20863903225 in words is "twenty billion, eight hundred sixty-three million, nine hundred three thousand, two hundred twenty-five".