158400020 has 24 divisors (see below), whose sum is σ = 334320000. Its totient is φ = 63040032.

The previous prime is 158400019. The next prime is 158400023. The reversal of 158400020 is 20004851.

158400020 is digitally balanced in base 2, base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

158400020 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 158399965 and 158400001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158400023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15920 + ... + 23879.

It is an arithmetic number, because the mean of its divisors is an integer number (13930000).

Almost surely, 2^158400020 is an apocalyptic number.

158400020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158400020 is an abundant number, since it is smaller than the sum of its proper divisors (175919980).

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

158400020 is a wasteful number, since it uses less digits than its factorization.

158400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40007 (or 40005 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 158400020 is about 12585.7069725940. The cubic root of 158400020 is about 541.0678685713.

Adding to 158400020 its reverse (20004851), we get a palindrome (178404871).

The spelling of 158400020 in words is "one hundred fifty-eight million, four hundred thousand, twenty".