20938474011 has 64 divisors (see below), whose sum is σ = 35620881408. Its totient is φ = 10644991488.

The previous prime is 20938474001. The next prime is 20938474019. The reversal of 20938474011 is 11047483902.

It is not a de Polignac number, because 20938474011 - 2⁷ = 20938473883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (20938474019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1071121 + ... + 1090493.

It is an arithmetic number, because the mean of its divisors is an integer number (556576272).

Almost surely, 2^20938474011 is an apocalyptic number.

20938474011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20938474011 is a deficient number, since it is larger than the sum of its proper divisors (14682407397).

20938474011 is a wasteful number, since it uses less digits than its factorization.

20938474011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19540.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 20938474011 in words is "twenty billion, nine hundred thirty-eight million, four hundred seventy-four thousand, eleven".