20449226938 has 36 divisors (see below), whose sum is σ = 37658711322. Its totient is φ = 8302679280.

The previous prime is 20449226923. The next prime is 20449226971. The reversal of 20449226938 is 83962294402.

It can be written as a sum of positive squares in only one way, i.e., 19169233209 + 1279993729 = 138453^2 + 35777^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 20449226891 and 20449226900.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 253633 + ... + 324388.

Almost surely, 2^20449226938 is an apocalyptic number.

20449226938 is a deficient number, since it is larger than the sum of its proper divisors (17209484384).

20449226938 is a wasteful number, since it uses less digits than its factorization.

20449226938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578075 (or 578049 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 20449226938 in words is "twenty billion, four hundred forty-nine million, two hundred twenty-six thousand, nine hundred thirty-eight".