20408022428 has 24 divisors (see below), whose sum is σ = 36297486624. Its totient is φ = 10038600000.

The previous prime is 20408022413. The next prime is 20408022443. The reversal of 20408022428 is 82422080402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20408022413) and next prime (20408022443).

It is a junction number, because it is equal to n+sod(n) for n = 20408022394 and 20408022403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97448 + ... + 224303.

It is an arithmetic number, because the mean of its divisors is an integer number (1512395276).

Almost surely, 2^20408022428 is an apocalyptic number.

It is an amenable number.

20408022428 is a deficient number, since it is larger than the sum of its proper divisors (15889464196).

20408022428 is a wasteful number, since it uses less digits than its factorization.

20408022428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322013 (or 322011 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The spelling of 20408022428 in words is "twenty billion, four hundred eight million, twenty-two thousand, four hundred twenty-eight".