20340554923 has 16 divisors (see below), whose sum is σ = 23137709056. Its totient is φ = 17747644320.

The previous prime is 20340554921. The next prime is 20340554957. The reversal of 20340554923 is 32945504302.

It is a cyclic number.

It is not a de Polignac number, because 20340554923 - 2¹ = 20340554921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20340554921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 569565 + ... + 604222.

It is an arithmetic number, because the mean of its divisors is an integer number (1446106816).

Almost surely, 2^20340554923 is an apocalyptic number.

20340554923 is a deficient number, since it is larger than the sum of its proper divisors (2797154133).

20340554923 is a wasteful number, since it uses less digits than its factorization.

20340554923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173874.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 20340554923 in words is "twenty billion, three hundred forty million, five hundred fifty-four thousand, nine hundred twenty-three".