20244428 has 6 divisors (see below), whose sum is σ = 35427756. Its totient is φ = 10122212.

The previous prime is 20244409. The next prime is 20244431. The reversal of 20244428 is 82444202.

It is a junction number, because it is equal to n+sod(n) for n = 20244397 and 20244406.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2530550 + ... + 2530557.

It is an arithmetic number, because the mean of its divisors is an integer number (5904626).

Almost surely, 2^20244428 is an apocalyptic number.

It is an amenable number.

20244428 is a deficient number, since it is larger than the sum of its proper divisors (15183328).

20244428 is a wasteful number, since it uses less digits than its factorization.

20244428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5061111 (or 5061109 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

The square root of 20244428 is about 4499.3808462943. The cubic root of 20244428 is about 272.5430866415.

The spelling of 20244428 in words is "twenty million, two hundred forty-four thousand, four hundred twenty-eight".