20005401902 has 8 divisors (see below), whose sum is σ = 30136893696. Its totient is φ = 9959770672.

The previous prime is 20005401893. The next prime is 20005401917. The reversal of 20005401902 is 20910450002.

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

It is a super-2 number, since 2×20005401902² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21464558 + ... + 21465489.

It is an arithmetic number, because the mean of its divisors is an integer number (3767111712).

Almost surely, 2^20005401902 is an apocalyptic number.

20005401902 is a deficient number, since it is larger than the sum of its proper divisors (10131491794).

20005401902 is a wasteful number, since it uses less digits than its factorization.

20005401902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42930282.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 20005401902 its reverse (20910450002), we get a palindrome (40915851904).

The spelling of 20005401902 in words is "twenty billion, five million, four hundred one thousand, nine hundred two".