20438798365 has 16 divisors (see below), whose sum is σ = 25005283200. Its totient is φ = 16032283072.

The previous prime is 20438798323. The next prime is 20438798371. The reversal of 20438798365 is 56389783402.

It is a cyclic number.

It is not a de Polignac number, because 20438798365 - 2¹⁵ = 20438765597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405216 + ... + 452854.

It is an arithmetic number, because the mean of its divisors is an integer number (1562830200).

Almost surely, 2^20438798365 is an apocalyptic number.

It is an amenable number.

20438798365 is a deficient number, since it is larger than the sum of its proper divisors (4566484835).

20438798365 is a wasteful number, since it uses less digits than its factorization.

20438798365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49316.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 20438798365 in words is "twenty billion, four hundred thirty-eight million, seven hundred ninety-eight thousand, three hundred sixty-five".