20021420102 has 8 divisors (see below), whose sum is σ = 30089554536. Its totient is φ = 9991568592.

The previous prime is 20021420101. The next prime is 20021420129. The reversal of 20021420102 is 20102412002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021420101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9569423 + ... + 9571514.

It is an arithmetic number, because the mean of its divisors is an integer number (3761194317).

Almost surely, 2^20021420102 is an apocalyptic number.

20021420102 is a deficient number, since it is larger than the sum of its proper divisors (10068134434).

20021420102 is a wasteful number, since it uses less digits than its factorization.

20021420102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19141462.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20021420102 its reverse (20102412002), we get a palindrome (40123832104).

The spelling of 20021420102 in words is "twenty billion, twenty-one million, four hundred twenty thousand, one hundred two".