20507343111 has 6 divisors (see below), whose sum is σ = 29621717840. Its totient is φ = 13671562068.

The previous prime is 20507343097. The next prime is 20507343119. The reversal of 20507343111 is 11134370502.

20507343111 is a `hidden beast` number, since 2 + 0 + 507 + 3 + 43 + 111 = 666.

It is not a de Polignac number, because 20507343111 - 2⁵ = 20507343079 is a prime.

It is a super-2 number, since 2×20507343111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20507343119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1139296831 + ... + 1139296848.

Almost surely, 2^20507343111 is an apocalyptic number.

20507343111 is a deficient number, since it is larger than the sum of its proper divisors (9114374729).

20507343111 is a wasteful number, since it uses less digits than its factorization.

20507343111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278593685 (or 2278593682 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The spelling of 20507343111 in words is "twenty billion, five hundred seven million, three hundred forty-three thousand, one hundred eleven".