20420402002 has 48 divisors (see below), whose sum is σ = 41860832832. Its totient is φ = 7343995680.

The previous prime is 20420401999. The next prime is 20420402021. The reversal of 20420402002 is 20020402402.

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, 714558 + ... + 742585.

It is an arithmetic number, because the mean of its divisors is an integer number (872100684).

Almost surely, 2^20420402002 is an apocalyptic number.

20420402002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20420402002 is an abundant number, since it is smaller than the sum of its proper divisors (21440430830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20420402002 is a wasteful number, since it uses less digits than its factorization.

20420402002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457183 (or 1457176 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 20420402002 its reverse (20020402402), we get a palindrome (40440804404).

The spelling of 20420402002 in words is "twenty billion, four hundred twenty million, four hundred two thousand, two".