20345423700 has 72 divisors (see below), whose sum is σ = 67275541312. Its totient is φ = 4650382080.

The previous prime is 20345423689. The next prime is 20345423741. The reversal of 20345423700 is 732454302.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4842049 + ... + 4846248.

Almost surely, 2^20345423700 is an apocalyptic number.

20345423700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20345423700 is an abundant number, since it is smaller than the sum of its proper divisors (46930117612).

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

20345423700 is a wasteful number, since it uses less digits than its factorization.

20345423700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9688321 (or 9688314 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 30.

The spelling of 20345423700 in words is "twenty billion, three hundred forty-five million, four hundred twenty-three thousand, seven hundred".