20898357054 has 16 divisors (see below), whose sum is σ = 41809578240. Its totient is φ = 6963975000.

The previous prime is 20898357049. The next prime is 20898357079. The reversal of 20898357054 is 45075389802.

It is a junction number, because it is equal to n+sod(n) for n = 20898356988 and 20898357006.

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, 514822 + ... + 553929.

It is an arithmetic number, because the mean of its divisors is an integer number (2613098640).

Almost surely, 2^20898357054 is an apocalyptic number.

20898357054 is an abundant number, since it is smaller than the sum of its proper divisors (20911221186).

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

20898357054 is a wasteful number, since it uses less digits than its factorization.

20898357054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072015.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 20898357054 in words is "twenty billion, eight hundred ninety-eight million, three hundred fifty-seven thousand, fifty-four".