202120092978 has 32 divisors (see below), whose sum is σ = 428047550784. Its totient is φ = 63405998592.

The previous prime is 202120092973. The next prime is 202120093037. The reversal of 202120092978 is 879290021202.

It is not an unprimeable number, because it can be changed into a prime (202120092971) 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, 1702801 + ... + 1817627.

It is an arithmetic number, because the mean of its divisors is an integer number (13376485962).

Almost surely, 2^202120092978 is an apocalyptic number.

202120092978 is an abundant number, since it is smaller than the sum of its proper divisors (225927457806).

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

202120092978 is a wasteful number, since it uses less digits than its factorization.

202120092978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132106.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 202120092978 in words is "two hundred two billion, one hundred twenty million, ninety-two thousand, nine hundred seventy-eight".